Rare Admiralty chart of Snake Cays and the Belize coast.

The survey was carried out by Commander Richard Owen, aboard H.M.S. Blossom. The Blossom was a 18-gun Cormorant-class sloop-of-war. She was built in 1806 and is best known for the 1825–1828 expedition under Captain Beechey to the Pacific Ocean. She explored as far north as Point Barrow, Alaska, the furthest point into the Arctic any non-Inuit had been at the time. She was finally broken up in 1848.

John and Charles Walker, founding members of the Royal Geographic Society, were leading mapmakers and engravers working in London in the first half of the nineteenth century. They are known to have produced numerous charts for James Horsburgh and the Admiralty.