A detailed map of the Sulu Archipelago, Basilan and part of Mindanao and neighboring islands, published by Alexander Dalrymple.
Includes two large insets of Toolyan Bay by James Rennel and Sooloo Road.
The chart includes a pronunciation guide at right, and a key to important lettered points at left. The imprint at bottom credits D. Lerpeniere with the etching and B. Henry with the engraved portions of the chart.
Alexander Dalrymple was a Scottish hydrographer who explored the Philippines in the employ of the East India Company.