Some of the maps were acquired by General Sir George Murrary during his active service, others later for historical purposes.

They are arranged as follows: Peninsula (numbers 1-88); France (numbers 89-95); uncertain locality (numbers 95-96); Canada (numbers 97-106); Flanders (numbers 107-133); various military actions, 1761-1846, and undated, especially those of 1813 (numbers 134-164).

A list has been placed at the front of each volume; only the manuscript items have been indexed.