Albert Bigelow Paine,
Mark Twain: A Biography. Volume III, Part 1…
“ MY DEAR MR. CLEMENS, Although you received the degree of doctor of literature last fall from Yale, and have had other honors conferred upon you by other great universities, we want to adopt you here as a son of the University of Missouri. In asking your permission to confer upon you the degree of LL.D. the University of Missouri does not aim to confer an honor upon you so much as to show her appreciation of you. The rules of the University forbid us to confer the degree upon any one in absentia. ”
