Albert McCart was Frances Carrico McCart Cobb's first husband. He was a Pvt in Co H (Martin's Regt Cav) 5th Regt Texas Partisan Rangers.

He apparently died in 1877, which leads credence to Alvin Cobb's marriage to Frances occurred in 1878.
This then leads one to believe that Alvin's first wife Lucy Logan was not being entirely truthful about having just been married in her interrogation by Union authorities in June of 1866. It does meant that Lucy died or divorced Alvin between 1866 and 1870.