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Map marking the routes through maritime Southeast Asia of two delegations: a French delegation from Brest, France to Siam in 1685; and a Siamese delegation from Siam to Brest in 1686. A note next to Aceh records a sea battle against Portugal in 1616.

A brightly-coloured hand-drawn map of the Gulf of Siam, made for a ship’s captain. The elaborate compass roses are the centre of a rhumbline network, a web of lines to aid navigation. Bathymetry (sea depth), islands, shoals and reefs are also marked.