Inscribed by the artist 'A Submarine' and signed below, lower right, this is an accurate port-bow depiction of the submarine 'G13' (which is on the side of the conning tower), launched on 18 July 1916, and completed to this form on 23 September 1916. Early in 1917 her superstructure was enlarged and brought forward to the bow, having the effect of making her look flush decked. She is here shown either coming into or passing out of harbour, with crew on the coaming and bridge. This drawing was reproduced in Wyllie and M.F. Wren's 'Sea Fights of the Great War' (1918) f. p. 94.