BELL, ALEXANDER GRAHAM. Autograph letter signed ("A. Graham Bell") to Mrs. Thomas Sanders, discussing the behavior of her children at his pioneer school. Boston, 18 December 1872. 4 pages, small 8vo, written on rectos and versos, slight separation at folds, some minor foxing. "... George would not lose much by living in some other house near here... He would certainly lose what I consider to be my valuable lessons by being absent at meal-times..." With a 10-line initial-signed postscript at end.