Delightful (third state) poster map of the London Underground designed by MacDonald Gill and first published, in a larger format, in 1914. Due to its popularity, the map was subsequently published in a reduced form in three states that can differentiated by the contents of a small triangle in the top left of the map. In the first state (1914) there are only houses in the triangle, while in the second state (1924) a British Imperial Lion appears to commemorate the British Empire Exhibition and in the third and final state (1927) a racing dog replaces the lion. This colourful, decorative map is filled with numerous details and commentary concerning London and its underground system. Blank verso. Other than some pinholes in a few of the folds, the map is a brightly coloured example in excellent condition. 74.5 cm x 94 cm