...e Custis, the son of Mrs. Washington by her first husband, was Washington's aid-de-camp at the siege of Yorktown, and died at the early age of twenty-eight. G. W. P. Custis, the grandson of Mrs. Washington , was educated at Princeton. His early life was passed at Mount Vernon, but after the death of his grandmother, in 1802, he built Arlington House, opposite the city of Washington, on an estate left ...