Note 1 — Introduction: The Subject, Method and Scope of this Inquiry

Definite forms of exchange along definite trade routes are to be found established between the various tribes. A most remarkable form of intertribal trade is that obtaining between the Motu of Port Moresby and the tribes of the Papuan Gulf. The Motu sail for hundreds of miles in heavy, unwieldy canoes, called lakatoi, which are provided with the characteristic crab-claw sails. They bring pottery and shell ornaments, in olden days, stone blades, to Gulf Papuans, from whom they obtain in exchange sago and the heavy dug-outs, which are used afterwards by the Motu for the construction of their lakatoi canoes.1