Arguably one of the most obscure Presidential postcards you’ll ever find, but that makes it even better:  divided-back card mailed in 1910, with stamp and most of a postmark, the message makes it apparent that the writer was the niece of Delia C. Torrey, whose home had been President Taft’s vacation destination.  The writer adds a note:  “He called to see Aunt Delia”.  So … only four degrees of separation between you (with the postcard) and Taft.  Grade: 1