It is clear then that the ships plying in the Arabian Sea in 1250–1350 were structurally weak. The question whether this feature persisted until 1500 must be answered almost exclusively from the early Portuguese literature. It is very voluminous; most of it is either badly indexed or not indexed at all; and I have not been able to search it all through, but have looked only in the likely places. My collection of passages may thus be incomplete, while those I have found are mostly fragmentary, and to interpret them itis necessary to have a general view of the course of shipping in the Arabian Sea.
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