Signed and inscribed 'HELIGOLAND' by the artist, lower left, this aerial view of the German island and naval harbour, seen from the south, was reproduced in Wyllie's co-authored book 'More Sea Fights of the Great War' (1919) f. p.18, with a brief related description on p. 19:

'Here is a drawing taken from high up in the southern sky which may perhaps give an idea of the appearance of this formidable little island. Many batteries are artfully concealed among the sandstone pinnacles and green fields. Nordhavn is the north-westerly point of the line of crumbling cliffs. Near it are many 12-inch guns and great howitzers. The Zeppelin sheds are on the high land, and to the east of the little town of Waldhavn, with its landing pier and marine mole. An old lighthouse stands to the south, and adjacent is the supposed site of the fire-control tower for the whole island. From the little town of Sudhavn two great jetties stretch to the south-east, enclosing the inner and outer harbours.'