Fourth of Henry Holiday's original ilustrations to "The Hunting of the Snark" by Lewis Carroll.From Fit the Second: The Bellman's Speech. This shows the Bellman's map, which, being blank, is equally useful everywhere, unlike normal maps:"Other maps are such shapes, with their islands and capes! But we've got our brave Captain to thank"(So the crew would protest) "that he's brought us the best-- A perfect and absolute blank!"
Original public domain image from Wikimedia Commons