There were forty-two slaves living at Muddy Hole Farm in 1799, including thirty-six owned by George Washington, five who were Custis estate dower slaves owned by Martha Washington, and one man who was rented from Mrs. French, one of the Washington's neighbors. This group twenty-four "adults" (considered to be anyone over eleven years old) and eighteen children under eleven years of age. Eleven of the adults were married, however only two couples lived together at this farm, with their spouses living on other farms at Mount Vernon. Of the eight family groups at the farm, six were headed by women. By 1799, nineteen of the twenty-four adults (79.17%) at Muddy Hole had been living there for at least thirteen years.