A large blue-backed chart of Vietnam, Hainan Island and southwest China, showing two potential routes to Hong Kong during the monsoon. There are inset maps of ports along the South China Sea coasts, including Hong Kong, Touron Bay (now known as Da Nang) and Ganlong Bay (now known as Ha Long Bay), and some coastal views to the upper left. This is the fifth in a set of six maps which illustrate the route to China via the Pacific.

James Imray (1803-1870), worked originally in the stationery and account book publishing business. In 1836 Imray joined with Michael Blachford. The partnership flourished and soon began to compete with the larger firm of Norie and Wilson. In 1846 Imray bought out Blachford, and the company survived, led by his descendants, into the twentieth century, when it merged with Norie and Wilson.