Drawings of the flags in use at the present time by various nations (1916)
Great Britain. Admiralty · London : H.M. Stationery, Eyre and Spottiswoode, limited, printers · leaf 433
Note--Hoisted on the mainmast of a royalvessel when His Majesty is on boatxi. 1^ ^M ^^ Imperial Standard. Nole:-Hoisted on the foremast of a royalvessel when His Majesty is on board(as a special sign that he is Commanderin Chief of the land & sea forces] … Standard of theHeir apparent.
Flags
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.