sentences:  Robert Sewall died on March 18, 1853, and bequeathed the house to his nieces, Susan and Ellen Daingerfield (his sister Susan's daughters).In 1879, the Daingerfields made a major alteration to the house by added a half mansard roof to the front.In 1865, Susan Daingerfield married John S. Barbour, Jr., a railroad executive who later became a U.S.