Just a suggestion.... Uriah had a disability discharge 9-1-1863, Co A & F 47th OH Inf; stepmom Sarah filed for hispension 5-17-1864. In his file, since she was not his mother, Sarah may attested to the name of his bio mother. His file should give his death location, but doubt it was in Vicksburg. His Co had left Vicksburg in May; in Jackson MS Jul 10-17; no locations for Aug; in Camp Sherman, Big Lick MS thru Sept 26.
Also death cert for Uriel might yield mom's name, providing the informant had knowledge of this info. Uriel is correct according to census and CW record.