British flags, their early history, and their development at sea; with an account of the origin of the flag as a national device
A historical study of British flags at sea by W. G. Perrin, Admiralty librarian, published by Cambridge University Press in 1922 for naval historians and heraldists. Colour plates show numbered rows of ensigns, jacks and standards in flat red, blue, green and gold, with crosses, harps, castles, lions, rayed suns and small galleons useful as heraldic and maritime motifs.
