Grant had control of his wife’s slaves who were not freed until the passage of the thirteenth amendment in 1866.Lee was not a slave owner but was the executor of his father in law and following his will freed those slaves.
The Grant slaves were freed in Jan 1865 when the State of Missouri outlawed slavery.
Well in the first place the 13th Amendment was ratified in 1865 not 1866. In the second place, Grant did not have control of his wife's slaves since she didn't own any. They remained the property of her father. Finally even if she did own them, Missouri outlawed slavery in January 1865 so how could she own them till 1866?
Lee was not a slave owner but was the executor of his father in law and following his will freed those slaves.
Lee's wife was the beneficiary of the will. Are you saying Grant could control his wife's chattel but Lee could not? Why not?