Collection of material created and compiled by Ettore Mancuso, a lawyer, newspaper editor, and prominent citizen of the city of Schenectady.

Harmen Harmanse was the patriarch of the Gansevoort family in Albany, New York, arriving in the area by 1657. Although not the first Ten Eyck in America, Jacob C. Ten Eyck was the first to come to Albany, moving from Manhattan after 1654. The two families intermarried several times over the years, along with other Dutch families in the area. This collection includes correspondence, financial records, estate records, and other family-related information.