+———Samuel Long Blair (13 Feb 1783 Northumberland Co, PA – 5 Sep 1861 Adeline, Ogle Co, IL)      |  +———Matthew Blair (14 May 1823 – 21 May 1891 Forreston, Ogle Co, IL)  |   |      |   +———Mercy Chidester (2 Dec 1791 Washington Co, PA – 19 Jun 1861)  |      Francis P. Blair (1856 – 4 Aug 1864)  |          |   +———Samuel Long Blair  |   |  +———Sarah Ann Blair (23 Dec 1827 Crawford Co, PA – 5 Sep 1913 Naperville, IL)      |          +———Mercy Chidester