"to my brother's son Josias Clapham two hundred fourty three Achres of four hundred joyning to Madm. Mason commonly called the Flat Spring to him and his heirs forever." A codicil added to the will reads "I leave my hole real Estate and Parsonable Estate to my brothers son Josias Clapham and if he dont come in, it is my desire that his brother Joseph should have it."[50] [50] _Landmarks_, 502; also Fairfax County Wills A1, 309 and B1, 26. Nicholas Cresswell, the journalist, as we shall see in Chapter XI, states that the younger Josias lived in Wakefield in Yorkshire and was much in debt. He decided to "come in" by emigrating to Virginia and soon appeared on his lands in the upper country. He became a great leader in Loudoun affairs. Toward the end of his long life he, in 1796, deeded to his son Samuel the estate later known as Chestnut Hill and the latter, soon thereafter, built the beautiful mansion which became another of Loudoun's outstanding and stately family seats and which still stands, in all its old-time charm, not far from the Point of Rocks, in one of the most fertile and captivating regions of Loudoun. Through the marriage of Betsy Price, a granddaughter of Josias Clapham, to Thomas F. Mason of the Gunston Hall branch of that family (and therefore cousin to that Thomson Mason of Raspberry Plain who we are about to meet) the house and estate, until very recent years, continuously was occupied by these Mason descendants of Clapham.[51] [51] C. O. Vandevantner in _Northern Virginian_, winter issue, 1932.