...ss, indeed, constitutes his main strength. I myself was first introduced to Mark Twain's books in 1872 by an unimpeachable English authority-on a somewhat different line from Mr. Clemens,--namely, Charles Darwin . What! he said to me, you have never read Mark Twain? I always keep his on a chair by my bedside that I may turn to it in case of sleeplessness! and however doubtful this form of complimen...