IL State Archives Marriage Database:
PURVIANCE, George W. and MISENER, Sarah Ann
married 17 August 1864 in Sangamon County.
MISNER, Christopher and Sarah Ann Covington
married 7 March 1850 in Sangamon County.
1850 Sangamon County IL Census lists:
PURVIANCE/PURVINES, Geo 21 IL @ Alex. 56 and Jane 45 & family.
MISENER, Christopher 25 IN
MISENER, Sarah 23 TN
1860 Sangamon County IL Census lists:
PURVINE, G. W. 35 OH
PURVINE, Dorcus 33 OH
PURVINE, C. S. 9 IL mw
PURVINE, E.V. 6 IL fw
PURVINE, Wm. 1 IL
It appears George was married previously to a Dorcus before his marriage to Sarah. Sarah Covington was married lst to Christopher Misener, if this is the right Sarah. There were numerous Purvines listed in the 1876 History of Sangamon County, including Alex. Purvines, whom George was residing with in 1850, but no mention is made of Alex. having a son George. This could all be conjecture on my part and needs much more research.