One of Mark Twain's school teachers was a Mr. Cross. AB Paine always refered to him as "Mr. Cross." in his various Twain biographies. Noted Twain researcher Ron Powers, in his book "Dangerous Waters" names this teacher as "Frank O. Cross";however, in Power's most recent book, "Mark Twain, A Life", he identifies this teacher as "Sam Cross." Errr....did Powers get his Crosses crossed? If any one out there actually knows the correct name, or anything else about this teacher, I would sincerely appreciate hearing from you. Stay Well RD