"Put a feather with a fossil and a bit of coral and everyone will think it's a specimen. Put the same feather with a ribbon and an artificial flower and everyone will think it's for a lady's hat. Put the same feather with an ink-bottle, a book and a stack of writing-paper, and most men will swear they've seen a quill pen. So you saw that map among tropic birds and shells and thought it was a map of Pacific Islands. It was the map of this river."