According to Clemens, both of these quips were made by his daughter Jean.
For #1, see his interview in _Minneapolis Journal_, 23 July 1895 (reprinted
in _Mark Twain: The Complete Interviews_ edited by Gary Scharnhorst.
For #2, see his autobiographical dictation for December 6, 1906, available
in _Autobiography of Mark Twain, Vol. 2_; online at the Mark Twain Project
website under the "Writings" link at marktwainproject.org
Barb