In 1751 Washington made his only trip abroad when he accompanied Lawrence to Barbados, hoping the climate would cure his brother's tuberculosis. Washington contracted smallpox during that trip, which immunized him but left his face slightly scarred. Lawrence died in 1752, and Washington leased Mount Vernon from his widow; he inherited it outright after her death in 1761. The Washington family was a wealthy Virginia family which had made its fortune in land speculation. Washington's great-grandfather John Washington immigrated in 1656 from Sulgrave, England, to the British Colony of Virginia where he accumulated 5,000 acres (2,000 ha) of land, including Little Hunting Creek on the Potomac River.