 The five farms, all highly developed and well-cultivated, were known as Mansion House Farm, Union Farm, Muddy Hole Farm, Dogue Run Farm, and River Farm.River Farm consisted of 1,806 acres and was purchased in 1769.Using present day landmarks, the original farm was roughly bounded on the north by what is now "Wellington," to the east by the Potomac River, and running diagonally south and west, Little Hunting Creek.