Background
Source: Wikipedia
Lieutenant Colonel William Gordon Perrin, OBE (1874–1931) was an RAF and Navy officer, and the Admiralty librarian from 1908 to 1931. He is most well known for his works on flags; particularly British Flags: Their Early History, and Their Development at Sea which has been described as the standard by which all other flag books are compared and Nelson's Signals in which he established that the flags which had been accepted as denoting Nelson's historic signal at Trafalgar were incorrect.
