After Martha Washington died in 1802 , she inherited about 35 dower slaves from her grandfather Daniel Parke Custis 's estate .
Upon her marriage , Elizabeth Law had inherited about 80 slaves from her late father 's estate .
After Martha Washington died in 1802 , Elizabeth Law inherited about 35 dower slaves from her grandfather Daniel Parke Custis 's estate .
Upon her marriage , Elizabeth Law had inherited about 80 slaves from her late father 's estate .