"I am an invisible man. No, I am not a spook like those who haunted Edgar Allan Poe; nor am I one of your Hollywood-movie ectoplasms. I am a man of substance, of flesh and bone, fiber and liquids--and I might even be said to possess a mind. I am invisible, understand, simply because people refuse to see me."

 - Ralph Ellison's "Invisible Man"

Library of Congress June 30, 1900, page 1

Library of Congress June 30, 1900, page 1

Letter to Theodore Roosevelt from Major George Ford from the Library of Congress Manuscript Division of Theodore Roosevelt Collection Reel 6, page 1.