Brain Surgery in Bronze Age

Trepanation is a surgical technique in which a hole is drilled into the human skull to treat intracranial diseases. It was quite popular during the 16th and 17th centuries in Europe. Count Philip of Nassau had 27 successive trepanations done in the 17th century. In England, it was a common form of treatment among miners who suffered cranial trauma.
Trepanation has a much older history; it was done during the Bronze Age in Peru and Jericho as well. During those times, it was done to repair skull fracture resulting blows, to remove splinters and blood clots. It was also done on dead people, to obtain skull bones to create necklaces.

At Ikiztepe, a small settlement near the Black Sea occupied from 3200 to 1700 B.C., archaeologist Önder Bilgi of Istanbul University has uncovered five skulls with clean, rectangular incisions that are evidence for trepanation, or basic cranial surgery. The procedure may have been performed to treat hemorrhages, brain cancer, head trauma, or mental illness. Last August Bilgi also unearthed a pair of razor-sharp volcanic glass blades that he believes were used to make the careful cuts.
There is ample evidence that Bronze Age sawbones knew what they doing. Last summer, biological anthropologist Handan üstündag of Anadolu University in Turkey excavated the 4,000-year-old trepanned skull of a man at Kultepe Höyük in central Turkey. üstündag says the surgeon cut a neat 1- by 2-inch incision, and  there are clear signs of recovery in the regrowth of bone tissue at the edges. Judging from the frequency of healed bone in such skulls, anthropologist Yilmaz Erdal of Hacettepe University in Turkey recently proposed that about half of all Bronze Age trepanation patients- and 60 percent of those in Turkey- survived the procedure.[Bronze Age Brain Surgeons]

Trepanation was practiced in Harappa (Lothal, Kalibangan) and the megalithic site of Maski too.

Trepanation is known from the Bronze Age Harappan (ca. 4300 BP) people of the Indus Valley Civilisation. Sarkar (1972) attributed a squarish hole on the right temporal skull of a child of 9-10 years skull found at Lothal, a Harappan site. Roy Chowdhury (1973) also believed that evidence of trepanation was present in Harappan skull No. H 796/B and H 802/B, from Cemetery R37 and possibly in a Kalibangan skull (another Harappan site) in Western India. A megalithic skull (M30) from Maski (Karnataka) in South India also showed evidence of trepanation (Sarkar, 1972): it has two circular holes of 22 mm and 15 mm respectively on the either side of the sagittal suture of the vertex.[Evidence of Surgery in Ancient India:Trepanation at Burzahom (Kashmir) over 4000 years ago]

While the skull of the child found in Lothal is considered the earliest evidence of this type of surgery, a ~4300 year old skull found in Burzahom (10 km north-east of Srinagar)  in Kashmir Valley is definite proof of trepanation. In this particular case, the victim had suffered a blow from a strong wooden stick. She survived the blow as well as the trepanation process.
(Thanks Michel Danino, for the links)
References:

  1. The Chicago medical recorder, Volume 35 By Chicago Medical Society
  2. God-apes and fossil men: paleoanthropology of South Asia By Kenneth A. R. Kennedy
  3. First evidence of brain surgery in Bronze Age Harappa, Current Science, Vol 100, No 11, 10 June 2011

Harappan Toys

Archaeologist Elke Rogersdotter, who was investigating the Bronze Age civilization at Harappa, has an interesting observation. Every 10th item found is related to play: dice, gaming pieces etc.

Repetitive patterns have been discerned in the spatial distribution, which may indicate specific locations where games were played.
“The marked quantity of play-related finds and the structured distribution shows that playing was already an important part of people’s everyday lives more than 4,000 years ago,” says Elke.
“The reason that play and game-related artefacts often end up ignored or being reinterpreted at archaeological excavations is probably down to scientific thinking’s incongruity with the irrational phenomenon of games and play,” believes Elke.“The objective of determining the social significance of the actual games therefore, in turn, challenges established ways of thinking. It is an instrument we can use to come up with interpretations that are closer to the individual person. We may gain other, more socially-embedded, approaches for a difficult-to-interpret settlement.”[Play was important – even 4,000 years ago]

The entire Doctoral dissertation is available for download.

The Harappan Diet

How do we find out what the Harappans cooked and ate? We know that they ate wheat, barley etc. but beyond that it was hard to know. But now using a new technique — analysis of microfossils such as starch grains — we have some answers.

Starch finds corroborate the conclusions drawn from the analysis of the macrobotanical remains of wheat, barley, millets (indigenous millets: Panicum and Setaria) and pulses (South west Asian and tropical pulse Macrotyloma). In addition, we have added tropical pulses (Vigna species), millets (of African origin, cf. Sorghum), vegetables such as cucurbits and eggplants — this being one of the earliest evidence of eggplants in South Asia, the earliest occurring in Bagor (Kashyap 2006) —, fruits like mango and date, and roots and tubers like Dioscorea, Zingiber and Curcuma species to the Harappan diet at Farmana (Table 1). Our study is thus making a new contribution to understanding human dietary behaviour in South Asia. [Harappan plant use revealed by starch grains from Farmana, India (H/T Carlos)]

Talk by J M Kenoyer on Harappan Civilization

In May, 2010, Prof. Jonathan Mark Kenoyer — who has been conducting archaeology in India and Pakistan since 1986 — gave a talk on the trade relations between the Indus Valley and Mesopotamia. In the talk (watch video), he presented the latest scholarship regarding the Indus: on origins, on the script and on the cultural exchange between Indus and Mesopotamia. He also used the S-word, a taboo among eminent historians.
A quick summary:

  • The Indus civilization flourished around two rivers — Indus and Sarasvati. Yes, he mentions that Ghaggar-Hakra is that river of antiquity. (Additional Reading: The Lost River by Michel Danino).
  • Potter’s marks were found in pottery of the Ravi phase (from 3300 BCE) which is around the same time writing developed in Mesopotamia and Egypt. This writing evolved into the Indus Script, which he says is a writing system, which codifies multiple languages. It was used for trade, accounting and rituals. He is working with folks from TIFR on some theories about the Indus script.
  • One of the seals display a diety sitting on an elephant and grabbing two tigers. While many have suggested that this represents a scene from Gilgamesh, Prof. Kenoyer suggests that this independently evolved in India.
  • He showed one Mesopotamian seal, dated to between 3300 – 2900 BCE, made from a shell found near Karachi. This falls between the period of the Dhuwelia cotton and time of Sargon of Akkad. (Additional Reading: Trading Hubs of the Old World)
  • Wheeled carts were being developed around the same time they were developed in the steppes.
  • Water Buffalo (both motif and animal) went to Mesopotamia from India. Dr. Asko Parpola also made a similar point. (Additional Reading: The Indus Colony in Mesopotamia)
  • There is similarity between the head dress of women in Harappa and one region of Mesopotamia. Maybe the women went via marriage?
  • Swastika was painted in Indian caves about 10,000 years back and in the Samara culture. Swastikas were also found in the Indus Valley.
  • He could not find evidence of warfare and thinks that warfare was not used a mechanism for integration. No weapons were found. Even in the motifs, the fights are between humans and animals or between humans and supernatural beings; never between humans.
  • Yoga had its origins in Indus Valley.
  • There was intensive trade with Mesopotamia from 2600 BCE. He also mentions Queen Puabi. He also talks about the Meluhhan interpreter and Meluhhan villages. (Additional Reading: The Indus Colony in Mesopotamia).
  • There was a concept of a passport in Central Asian trade. They found seals with the Central Asian motif on one side and the Harappan motif on the other. No such seal exists for Mesopotamian trade.
  • Women who had wide bangles were burried separately. Similar wide bangles, crafted in the Indus, were found in Susa,Iran and he makes the argument that they were powerful nomadic traders.
  • There was a social hierarchy – land owners, elites, ritual specialists — and this was deduced from burial patterns.

 

In Pragati: An Outdated Syllabus

(Photo: Justin Gaurav Murgai)

(a shorter and sweeter version of this article appeared in the Nov 2010 issue of Pragati)
Recently M. Night Shyamalan kicked off a race row with his latest movie The Last Airbender (2010). In the TV series, the characters, Aang, Katara, Sokka are Asian, but in the movie, they were portrayed by white actors; the casting call specifically asked for Caucasian actors. Shyamalan was accused of “whitewashing” and “racebending.” Another movie which attracted similar attention was Walt Disney’s Prince of Persia: The Sands of Time (2010) where actor Jake Gyllenhaal played an Iranian Prince. But in this case, most Iranians were pleased that a fair skinned actor played the role because it accurately represented how “Aryan” Iranians looked before Islam was forcibly imposed.
In Iran, the external Aryan ancestry is a non-issue, but in India it is a matter of angry controversy. The fact that it is a source of controversy in India has been bothering scholars in Western universities. In his course, History of Iran to the Safavid Period, Prof. Richard W. Bulliet, an Iranian specialist at Columbia University ridicules the people who oppose Aryan invasion theory and tells students that Indians believe that proponents of the Aryan Invasion Theory are members of CIA who want to portray India as a wimpish state; he specifically mentions members of BJP as belonging to this group.
In the first lecture he mentions the similarities between Old Iranian and Vedic and their relation to the Indo-European languages. For him, this similarity indicates invasion, and this invasion theory is supported not just by philologists, but also by archaeologists and historians. This Grand Canyon wide gap between scholarly consensus and what is being taught in American universities is not surprising. Last Fall, in a course titled  History of India, at University of California, Los Angeles, Prof. Vinay Lal lectured about rejected 19th century racist concepts like “subdued snub-nosed and dark skinned people known as the Dasas” and how forts and citadels were attacked by the invading Aryans.
These professors are wrong — about the Aryan Invasion Theory, about race, about the people who dispute it and the reason they dispute it. Though nationalism and sometimes Hindu nationalism is blamed, the reason why Indians are suspicious of colonial theories will become obvious as we look at an example where “scientific” European minds applied pseudoscience and divided the Indian population.
First, let us look at the Aryan Invasion Theory. In his book The Quest for the Origins of Vedic Culture: The Indo-Aryan Migration Debate (2004), Prof. Edwin Bryant who looks at both sides of the Aryan debate concludes that, “there is general consensus among South Asian archaeologists that, as far as archaeological record is concerned, clear, unambiguous evidence of invading or immigrating Aryans themselves is nowhere to be found either in central Asia or in the Indian subcontinent.” Romila Thapar writes in Early India: From the origins to the AD 1300 (1995), that, “The theory of an Aryan invasion no longer has credence.”
Second, when it is mentioned that only members of the BJP are against the Invasion Theory, it is incorrect. Edwin Bryant is not an Indian; Romila Thapar is an antagonist of Hindu Nationalists. Truth is the casualty when he says that opponents of Aryan Invasion Theory have been ignoring archaeological evidence for Prof. Bryant’s survey shows that it is the lack of archaeological evidence, among other things, which prompted many historians to re-think. Instead of the invasion theory, many scholars now believe in a migration theory.
Finally, Prof. Bulliet says that opponents of the invasion might take refuge in the writings of his colleague Edward Said, the author of the seminal book Orientalism. On this point, he is absolutely right. It was the colonial historian who gave us the concept of race. 19th century Europe was the center of racial studies; scientists measured the volume of the skull for various races and found that the white race was the largest and hence of superior intellect.
From 1891, the British official, Herbert H. Risley defined 2378 castes as belonging to 43 races on the basis of their nasal index. Also, Indo-European, Dravidian, Austro-Asiatic, Tibeto-Burman linguistic groups were identified as different races with Indo-European speakers or Aryans at the top of the tree. Based on this mythology, the skeletons found in Mohenjo-daro were classified as belonging to various races, mostly non-Aryan.  Coming to the Vedic texts, a racial interpretation was assigned to various passages. The dark skinned and nose-less Dasyu was considered of a different race than the fair and high-nosed Aryan. This racial identification was objected to by Indian scholars like Srinivas Iyengar as early as 1914, but such dissenting voices were not the ones writing history.
Following World War II, Western anthropologists realized that race cannot be scientifically defined, based on cranial size or nasal index. According to Prof. Kenneth A. R. Kennedy, who has studied the Harappan skeletal remains extensively, “Biological anthropologists remain unable to lend support to any of the theories concerning an Aryan biological or demographic entity.” According to Prof. Gregory Possehl, an anthropological archaeologist at the University of Pennyslvania, “Race as it was used in the nineteenth and early twentieth centuries has been totally discredited as a useful concept in human biology.” Thus there is nothing to distinguish the invaders from the natives; in short, there is no Aryan or Dravidian race.
A century after Indian scholars raised objections, Western scholars are realizing that the racial interpretation was based on over reading soft evidence; it was a consequence of the 19th century racial insanity that ruled Europe. In 1999, Hans Hock reexamined the supposedly racial Vedic material and found them either to be mistranslated or open to alternative non-racial interpretations. Among multiple interpretations, the racial one was preferred because it favoured colonialism. Still the Professor at UCLA still talks about the snub-nosed Dasyus, even though Indian scholars have interpreted that the Vedic word means one devoid of speech, not nose.
Over the years, historians have accepted that various language groups are just that — language labels — and does not map to racial identity. In the 11th Neelan Thiruchelvam Memorial Lecture given in Colombo on Aug 1, 2010, Prof Romila Thapar made this very clear. According to her the notion of separate Aryan and Dravidian racial identities has no basis in history. According to Prof. Thomas Trautmann, “That the racial theory of Indian civilization still lingers is a matter of faith. Is it not time we did away with it?” But even in the last general elections, the Dravidar Kazhagam party leader exhorted his followers to reject “Aryan” candidates.
It is such non-benign theories and their consequences that has caused Indian scholars to view Western theories with suspicion. Prof.  Edwin Bryant writes, “I argue that although there are doubtlessly nationalistic and in some quarters, communal agendas lurking behind some of this scholarship, a principal feature is anti-colonial/imperial.” Thus the issue is not what members of BJP believe or do not believe; the issue is what is the latest scholarly consensus and why is it not being taught to students. Maybe the Prince of Persia can investigate if the CIA is involved.

References:

  1. Michel Danino, The Indus-Sarasvati Civilization and its Bearing on the Aryan Question
  2. Michel Danino, Genetics and the Aryan Debate, Purtattva, Bulletin of the Indian Archaeological Society No. 36 (2005- 06): 146-154.
  3. Edwin Bryant, The Quest for the Origins of Vedic Culture: The Indo-Aryan Migration Debate (Oxford University Press, USA, 2004).
  4. History of Iran to the Safavid Period, Columbia University (Podcast, Lecture 1)

Lost Language Decipherment using Computers

The headline reads Software that automatically deciphers ancient language developed. The language thus deciphered was Ugaritic – used in Syria from the 14th through the 12th century BCE.  To find out if such a technique can be used to decipher the Indus script, we need to understand how Ugaritic was deciphered.
The language itself was deciphered manually decades earlier. What helped the manual decipherment was the fact that Ugaritic is similar to Hebrew and Aramaic. The first two Ugaritic letters were decoded by mapping them to Hebrew letters and then based on this information few other words were also deciphered. Then one word inscribed on an axe was guessed to be “axe”, which turned out to be a lucky guess.
There were two inputs to the computer program: corpus of the lost language and the lexicon of the related language. The output was the mapping between the alphabets of the known language and Ugaritic and also the traslation between Ugaritic and cognates in the known language. The program was able to map 29 of the 30 letters accurately. It also deduced the cognates in Hebrew for about 60% of the words.
But when it comes to the Indus script, both the script and language are unknown; there is no second input to the program. Still that has not prevented researchers from applying various techniques to gain insight into what the script represents. In the 60s the Soviets and Finns used mathematical models find order in the symbols. Taking this further, Subhash Kak did a mathematical analysis of the Indus script and the oldest Indian script – Brahmi. When a table containing the ten most commonly occurring Sanskrit phonemes (from ten thousand words), was compared to the ten most commonly occurring Indus symbols and there was a convincing similarity, even though Brahmi was a millennium after the Indus script. Surprisingly some of the characters, like the fish, looked similar too.
But that’s it. The current research is not in comparing Indus script with a known language, but in finding if the Indus script even encodes a language or not.
References:

  1. Benjamin Snyder, Regina Barzilay, and Kevin Knight, A statistical model for lost language decipherment, in Proceedings of the 48th Annual Meeting of the Association for Computational Linguistics(Uppsala, Sweden: Association for Computational Linguistics, 2010), 1048-1057
  2. Subhash C. Kak, A FREQUENCY – ANALYSIS – OF – THE – INDUS – SCRIPT – PB – Taylor & Francis, Cryptologia12, no. 3 (1988): 129.
  3. Subhash C. Kak, INDUS – AND – BRAHMI – FURTHER – CONNECTIONS – PB – Taylor & Francis, Cryptologia 14, no. 2 (1990): 169.

Aryans, Early Christians and their Travel Plans

  1. In Robert D. Kaplan’s South Asia’s Geography of Conflict (warning: pdf), there is a section about the history of India. He writes
  2. “Aryans may have infiltrated from the Iranian plateau, and together with the subcontinent’s autochthonous inhabitants were part of a process that consolidated the political organization of the Gangetic Plain in northern India around 1000 B.C.”

    Once upon a time, the Aryan Invasion Theory was considered infallible; now everyone agrees that there was no invasion. AIT morphed into the Aryan Migration Theory, Two Wave Migration theory, trickle down theory etc. Now that too has become: may have happened.

  3. In a blog post, Ajay Makken, MP (Cong) writes about Homeland security
  4. India has been a land where people have mastered fusion, a land, a place where perhaps the first Jews arrived, soon after Jerusalem fell, where perhaps Christians came back as early as 3rd Century and had settlements on shores of India as early as 4th Century, where perhaps the Parsis came in 7thCentury after being driven away from Iran and even now, in the last century we have Bahai’s who were driven from their mother land and who came and sought refuge in India.

    He mentions the date of Christian arrival as 3rd century, discounting the myth of St. Thomas (52 CE). According to Pope Benedict, St. Thomas went only as far as Western India. According to Romila Thapar, there is no historical evidence to the claim that he was martyred in Mylapore. According to her, the first coming of Christians is associated with the migration of Persian Christians led by Thomas Cana around 345 CE.

Hat Tip to Dhruva, Pragmatic Euphony

In Pragati: Book Review – The Lost River by Michel Danino

The Lost RiverIn 2003, the Union Minister for Tourism and Culture, Jagmohan sanctioned Rs. 8 crore to the Archaeological Survey of India (ASI) to search for the river Sarasvati. Though it was an inter-disciplinary archaeological program involving the Indian Institute of Technology and the Birbal Sahni Institution, designed to settle different schools of thought regarding the existence of the river, the venture was seen as “an attempt by RSS inspired historians to liken the Harappan civilisation with the Vedic era.” The project was shelved by the UPA Government.
In February 2009, the “International Conference on the Sindhu-Sarasvati Valley Civilization: A Reappraisal” was held in Los Angeles, CA, “to discuss, reconsider and reconstruct a shared identity of the Sindhu (Indus) and Sarasvati cultures, using archaeological and other scientific evidence as well as Vedic literature.” The title of the conference, specifically the use of the word Sarasvati, caused consternation among few Western scholars prompting Prof Ashok Aklujkar, Professor Emeritus at University of British Columbia to write a scathing rebuttal.
To understand why Sarasvati is a controversial topic in the 21st century we need to look at evidence from a number of sources: from tradition, archaeology, literature, geology, and climatology. We need to understand the path of Sarasvati, its life span, and traditions that arose within its banks that survive to this day. Finally, we also need to look at how Sarasvati challenges the Aryan invasion/migration theory.
In this 368 page book, Michel Danino narrates Sarasvati’s tale, assembling it from the reports of Western explorers, Indian scholars, Archaeological Survey publications, and Vedic texts. Danino who was born in France and has been living in India since the age of 21, has published papers like The Horse and the Aryan Debate (2006), Genetics and the Aryan Debate (2005), A Dravido-Harappan Connection? The Issue of Methodology (2007) and also the book The Invasion that Never Was (2000) on the Aryan Invasion Theory.
Continue reading “In Pragati: Book Review – The Lost River by Michel Danino”

Dr. Allchin and Sarasvati Research

In the 31st Indian History Carnival, we featured a post by Nicole Bovin on Dr. Raymond Allchin, the South Asian archaeologist who passed away on June 4th. The European Association for South Asian Archaeology and Art too had a brief note about his work.

Raymond Allchin was born in Harrow in 1923 and educated at Westminster, but his lifetime commitment to South Asia came when he was posted there during the War in 1944. Quickly switching interests from architecture to archaeology, Raymond was appointed a Lecturer at the School of Oriental and African Studies in 1954 before moving to Cambridge in 1959. Following a career of fieldwork and research across India, Pakistan, Nepal, Bangladesh and Sri Lanka, he retired from Cambridge University with the title of Emeritus Reader in South Asian Archaeology in 1989. Now freed from University burdens, Raymond committed the next twenty years to developing the research profile of The Ancient India and Iran Trust.[In memoriam Raymond Allchin]

Dr. Allchin was an expert on the Indus Valley civilization. “Cultural convergence” — that is the name he proposed for the process by which various regional cultures like Amri-Nal, Kot-Diji, and Sothi-Siswal converged for the Mature Harappan phase. Dr. Allchin also connected Harappan motifs with Vedic themes. For example, looking at a seal from Chanhu-daro he connected it with the Vedic theme of union of heaven and earth. When Dholavira was discovered in J.P.Joshi in 1966 he thought it was one of the most exciting discoveries of the past half a century. On the fire altars found at Kalibangan, he noted that fire rituals formed a part of the religious life at a civic, domestic and popular level.
One of the questions that still remain unanswered about the Indus civilization is this: How was it administered.? We don’t know who controlled the urban centers or how such a vast territory — bigger than ancient Mesopotamia or Egypt — was controlled. Even though he acknowledged that there was no trace of royalty like in other ancient societies, Raymond Allchin thought that there was a forgotten Indian leader who unified the Indus heartland and controlled trade with Mesopotamia.
He had accepted the Ghaggar-Hakra as Sarasvati. This was not unusual for Sarasvati was not such a controversial topic then. Ever since the French scholar Vivien de Saint-Martin identified the Ghaggar, Sarsuti, Markanda and other small tributaries as part of the Rig Vedic Sarasvati, scholars like Max Müller, Sir Monier Monier-Williams, A. A. Macdonnel, A.B. Keith, Louis Renou, Thomas Burrow A. L. Basham along with Indian scholars like M. L. Bhargawa, B.C.Law, H.C. Raychaudhuri, A.D. Pusalker and D.C. Sirkar had all agreed on this point.
In the entry he wrote for Encyclopaedia Britannica he mentioned that hundreds of Indus sites were found on the banks of the ancient Sarasvati river which flowed east of the Indus. He also wrote how moved he was standing on a mound in Kalibangan looking at the flood plain of Sarasvati. Dr. Allchin also believed that there was a reduction of sites between 2000 – 1700 BCE after a major part of the river’s water supply was lost.
But doesn’t this mean that the Vedic people, who composed the Rig Veda, while Sarasvati was a majestic river co-existed with the Harappans? Dr. Allchin was not ready to make that leap. In the same book where he mentioned that Sarasvati lost a major part of the water supply between 2000 – 1700 BCE, he contradicted himself and wrote that Sarasvati was a major river between 1500 and 1000 BCE. By this trick, Sarasvati remains a mighty river when the Aryans came in 1500 BCE.
This is not surprising too. Only few scholars like B.B.Lal, S.P. Gupta, V.N. Mishra and Dilip Chakrabarti have argued that the Vedic people lived along the banks of Sarasvati while it flowed from the mountain to the sea during the Mature Harappan period.
Reference:

  1. Michel Danino, Lost River: On The Trail of the Sarasvati (Penguin Books India, 2010)

Harappan Coastal Towns

The city of Dholavira (see map), an important site of the Harappan civilization, is located in a small island in the Rann of Kutch. Discovered in 1966, it was excavated two decades later. It was not a small town; extending over 47 hectares, it ranks among the top five Harappan sites. Now new discoveries from this area are changing our understanding of the Harappan sites which were hundreds of kilometers away from the well known sites of Mohenjo-daro and Harappa, but were coastal towns.
For example a huge tank like structure was discovered at Lothal, which is about 50 km east of Dholavira. Located near Bhogavo, a tributary of Sabarmati river, Lothal is a small site (7 hectares) which followed the Harappan tradition of wide streets and fortification. The “tank” structure is 217m long and 36m wide and its walls were made of millions of baked bricks.  When stone anchors and marine shells were found in this tank, archaeologists identified it as a tidal dockyard. During high tide, boats could sail up the Bhogavo and dock here. The warehouse was nearby and there was a spillway for overflowing waters.
Then as with almost anything related to the Harappan civilization, this identification is controversial. Some argue that it was just a reservoir and nothing more. Then shouldn’t a reservoir have slanted steps like in Dholavira or Mohenjo-daro? If it were a reservoir, would the Harappans empty waste water into it?[1Recently Dennys Frenez of the University of Bologna found some hints that wide canal connected the basin with the sea which supports the theory that the tank was indeed a port[3].
To understand what goods went out from Lothal we need to visit Kanmer.  Located close to Dholavira, it had a population of less than 500 people during the peak of the Harappan civilization. The people of this fortified city were involved in bead making — from carnelian, lapis and agate — and exporting. One of the difficult tasks for the bead makers was drilling the small hole for the string which was done using drill bits made of hardened synthetic  stone. Also found in Kanmer were clay seals with a central hole (see pic). According to the dig director Toshiki Osada, they might be pendants used as a kind of passport in trade. 
References:

  1. Michel Danino, Lost River: On The Trail of the Sarasvati (Penguin Books India, 2010).
  2. D.P Agrawal et al., Redefining the Harappan hinterland, Antiquity, 084, no. 323 (March 2010). 
  3. Andrew Lawler, The Coastal Indus Looks West,  Science, May 28, 2010. (via Ranjith P)