Revision History: HES 2005-11-07 incomplete; was to Redpath and Fall, 1872.01.10, from Pittsburgh | vf 2012-11-07 redated to 13 January 1872 (2nd of 3) | vf 2014-06-30 redated to 11 January 1872. Letter was possibly mailed on 13 January. | vf 2014-07-02 redated again to 10 and 11 January 1872 (see commentary and note)