She freed her husband 's slaves in January 1801 , just over a year after his death .
Washington 's will included manumission for the enslaved people he held upon the death of his widow Martha Washington .
widow freed widow 's husband 's slaves in January 1801 , just over a year after Washington 's death .
Washington 's will included manumission for the enslaved people he held upon the death of his widow Martha Washington .