They organized long ceremonial voyages on their primitive type of canoes to maintain their traditional system of inter-island trade relationship, which in some ways resembled the 'kula' of the Trobriand Islands, as described by Malinowski (1922) in his book Argonauts of the Western Pacific.
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After having secured First position in First Class in both, B.A. (Honors) and M. A. in Anthropology, Professor Sahay was awarded doctoral degree in Anthropology from Ranchi University, Ranchi in 1979 for his research work in the Nicobar Archipelago.