Thomas Butler Gunn (15 February 1826 – 7 April 1904) was an English born illustrator, writer and war correspondent who spent fourteen years in America. His diaries of this period provide details of his life amongst the bohemian writers and artist in New York including Frank Bellew, Sol Eytinge Jr., Fanny Fern, Thomas Nast, James Parton, Fitz James O'Brien, Alfred Waud and Walt Whitman.