William Winter, Appletons' Cyclopædia of American Biography (1900)
“ This is a peculiarity of mental bias by no means unusual with actors; and it is furthermore to be observed that, in actual experience, tragic actors are often found to be cheerful, and even hilarious, as private individuals, while comedians are extremely apt to prove serious, pensive, and even melancholy. Burton was one of the funniest creatures that ever lived, but his interior nature was thoughtful and saturnine. He thought, felt, and understood tragedy, but when he came to act, he was all comedian. At the outset of his career he led the usual life of an itinerant actor. ”
