Francis Scott Key's original manuscript copy of his "Star-Spangled Banner" poem. It is now on display at the Maryland Historical Society.
Francis Scott Key
published 1914
Frank A. O'Connell; Wilbur F. Coyle (1914). <i><a rel="nofollow" class="external text" href="https://archive.org/stream/nationalstarspan02nati#page/n63">National Star-Spangled Banner Centennial, Baltimore, Maryland, September 6 to 13, 1914</a></i> (1914). Baltimore: National Star-Spangled Banner Centennial Commission. p. 64.