This cartoon of the Kaiser as a gargoyle is based on an etching by Charles Méryon:
Cartoon by L. Patten
Published in Punch 28th October 1914
Charles Méryon, according to Wikipedia, was “a French artist, who worked almost entirely in etching, as he suffered from colour-blindness. Although now little-known in the English-speaking world, he is generally recognised as the most significant etcher of 19th century France. He also suffered from mental illness, dying in an asylum.” This is the original etching on which the cartoon is based: