Rare Admiralty chart of the Cayos Arcas, in the Gulf of Mexico.

The title states that the chart was copied from a ‘Spanish printed Plan’, this refers to the ‘Portulano de la America Setentrional’ a work published by the Spanish Admiralty in 1809, and containing 111 charts of the Caribbean and Gulf of Mexico. A second edition of the pilot was published in 1818 with 121 charts.

John Walker, founding members of the Royal Geographic Society, was a leading mapmaker and engraver working in London in the first half of the nineteenth century. He is known to have produced numerous charts for James Horsburgh and the Admiralty.