Hans Christian Andersen, Michael W. Perry, George MacDonald (2001). “Stories for Girls: Lovingly Adapted for Twenty-First Century Children”, p.6, Inkling Books
Willard Fiske (1859). “The book of the first American chess congress: containing the proceedings of that celebrated assemblage, with the papers read in its sessions, the games played in the grand tournament, and the stratagems entered in the problem tournay ; together with sketches of the history of chess in the old and new worlds”, p.16