Correspondence; "The Ridge" hand drawn maps, photographs, related material; Helen Lossing Johnson diary; genealogical material; estate inventories; drawings; ephemera

Edwin John Lossing diary; Benson John Lossing notebook; newspaper clippings

U. S. Navy. Bureau of Ordnance. Surveys; N. Y. Supreme Court. Order; deeds, mortgages, releases, wills, and bonds; newspaper clippings

Helen Lossing Johnson diary 1878-1880

Helen Lossing Johnson diary 1880-1882

Nehemiah Sweet Treasurer's Day Book for Dutchess County, New York 1836-1842

Diplomas and certificates