sentences:  In 1795, Walter Dulany Addison (who owned Oxon Hill) and John Addison (who owned Gisbrough) deeded of their land to their brother, Thomas Grafton Addison.He built a large home on a high point on the land, and named the mansion "Bellevue".Thomas Grafton Addison sold about half of Bellevue by 1826, and at his death the remainder was transferred to local planter Zacariah Berry, Sr. to pay debts.