File:Grave of Douglas Merritte MD1.jpg - Wikimedia Commons

gatorbest, The Ole BallCoach

Douglas Cemetery - SC Picture Project

Margaret Fraser Douglas (1825-1915) - Find a Grave Memorial

tribute to Douglas - Picture of Cedar Hill Cemetery, Vicksburg

Douglas: The Faithful and Patient Civil War Camel

gatorbest, The Ole BallCoach

Douglas Merritte (1919-1925) - Mémorial Find a Grave

Grave of Douglas the Confederate Camel – Vicksburg, Mississippi - Atlas Obscura

Douglas Cemetery - SC Picture Project

gatorbest, The Ole BallCoach

Douglas McClure (1931-2005) - Find a Grave Memorial

Frederick Douglass (1818-1895) - Find a Grave Memorial

PDF) The Horse in Literature and Film Francisco Larubia-Prado