according to the death certificate he was buried at Cavalry cemetery in Memphis. You could contact them and see if Rosalie is next to him and what dates are listed for her. Volunteers at findagrave.com might also look for you. Her mother Teresa is also buried at Calvary(and probably her father, but there's no record), sounds like a good catholic family.
Rosalie was in the city in 1942, but not 43. She seems to have moved in 41 and 42. She could have moved out of the county.