On July 9, 1799, Washington finished making his last will; the longest provision concerned slavery. All his slaves were to be freed after the death of his wife Martha. Washington said he did not free them immediately because his slaves intermarried with his wife's dower slaves. He forbade their sale or transportation out of Virginia. His will provided that old and young freed people be taken care of indefinitely; younger ones were to be taught to read and write and placed in suitable occupations. Washington freed more than 160 slaves, including 25 he had acquired from his wife's brother in payment of a debt freed by graduation. He was among the few large slave-holding Virginians during the Revolutionary Era who emancipated their slaves.