Scribal motivation

“My subject had taken me up, drawn me on, and absorbed me into itself. It was necessary for me, it seemed, to write the book I had been thinking much of, even if it were destined to fall dead from the press, and I had no inclination or interest to write any other.” — John Lothrop Motley (quoted in The Cambridge History of English and American Literature, Vol. XVI, Book II, Ch. 18)