LT London Underground Visitors London Map Henrion MidcenturyOriginal vintage travel advertising poster for a London tour guide Visitor's London by the notable graphic designer Frederic Henri Kay Henrion (1914 1990) featuring a surreal mid century illustration of a figure in shades of black and white with a red London Underground roundel logo as its mouth and an upside down Eiffel Tower inside its body, an open Visitor's London book running through the middle with an illustration of Buckingham Palace in shades