When Stephen van Rensselaer inherited the rights to the Manor of Rensselaerswyck in 1785, a survey of the holdings was made. The holdings were divided into two parts: the East Manor and the West Manor. The East Manor consisted of the areas known as Elizabethtown (Brunswick), Phillipstown (Nassau), Roxborough (Grafton), Greenbush, Schodack, Stephentown, Middletown, and Little Hoosick. This collection contains correspondence, financial records, reports, advertisements, troop rosters, property records, inventories, and other related materials.

William Wheeler (1780-1833) seems to have been one of the first of the Wheeler family in Albany County, New York. Born in Oyster Bay, New York, he became a wheelwright and farmer in Westerlo. This collection contains genealogies, correspondence, and other family-related materials.