Antioch Cemetery book has error - gives birth as 1 Mar 1819.
After John died, Mary Frances married John T. Farrier who was several years younger than she. 15 Jul 1878 in Dade Co. Here they are in the 1880 Census:
John Turner POINDEXTER and Mary Francis WEST were married on 13 October 1870 in Dade County, Missouri. Mary Francis WEST, daughter of Isham WEST and Alzada PERRY, was born on 7 October 1849 in Dade County, Missouri. She died on 13 October 1905 at the age of 56.
Mary Francis's sister Clarinda married John Newton Jones - he was a first cousin of Mary Francis's husband John Turner Poindexter.