Erica Armstrong Dunbar in The New York Times:
When he was 11 years old, Washington inherited 10 slaves from his father’s estate. He continued to acquire slaves — some through the death of family members and others through direct purchase. Washington’s cache of enslaved people peaked in 1759 when he married the wealthy widow Martha Dandridge Custis. His new wife brought more than 80 slaves to the estate at Mount Vernon. On the eve of the American Revolution, nearly 150 souls were counted as part of the property there. In 1789, Washington became the first president of the United States, a planter president who used and sanctioned black slavery. Washington needed slave labor to maintain his wealth, his lifestyle and his reputation. As he aged, Washington flirted with attempts to extricate himself from the murderous institution — “to get quit of Negroes,” as he famously wrote in 1778. But he never did.
During the president’s two terms in office, the Washingtons relocated first to New York and then to Philadelphia. Although slavery had steadily declined in the North, the Washingtons decided that they could not live without it. Once settled in Philadelphia, Washington encountered his first roadblock to slave ownership in the region — Pennsylvania’s Gradual Abolition Act of 1780. The act began dismantling slavery, eventually releasing people from bondage after their 28th birthdays. Under the law, any slave who entered Pennsylvania with an owner and lived in the state for longer than six months would be set free automatically. This presented a problem for the new president. Washington developed a canny strategy that would protect his property and allow him to avoid public scrutiny. Every six months, the president’s slaves would travel back to Mount Vernon or would journey with Mrs. Washington outside the boundaries of the state. In essence, the Washingtons reset the clock. The president was secretive when writing to his personal secretary Tobias Lear in 1791: “I request that these Sentiments and this advise may be known to none but yourself & Mrs. Washington.”
More here. (Note: One post throughout February will be dedicated to Black History Month.)