MacDonald "Max" Gill (1884-1947) was a renowned British architect, letterer, mural painter, and graphic artist of the early twentieth century. He is perhaps best known for his pictorial poster maps, including the whimsical 1914 "Wonderground Map," which proved so popular with riders that it became the first London Underground poster to be sold commercially to the public and is today considered to have saved the network by increasing off-peak travel...