Robert Louis Stevenson, Art of Writing (lire en ligne), « III » : « Perhaps my dearest and best friend outside of Shakespeare is D'Artagnan - the elderly D'Artagnan of the vicomte de Bragelonne. I know not a more human soul, nor, in his way, a finer; I shall be very sorry for the man who is so much of a pedant in morals that he cannot learn from the Captain of Musketeers. ».