Matthew Vassar married Catharine Valentine from Fishkill. "In the following summer 1812 [sic] began the world,—that is the buisness world for myself by getting married and begining house-keeping, Renting part of a tenement at $40 pr year, and was severely rebuked by my Father for my extravagence —$25 pr year was as much as he thot I ought to pay...." Elizabeth Hazelton Haight, ed., Autobiography and Letters of Matthew Vassar
Matthew Vassar entered into partnership with Thomas Purser, the existing co-partnership of M. Vassar & Co. having been dissolved in July. The brewery on Vassar and Bridge Streets was built. Purser's interest was sold to J.M. and N. Conklin, Jr. on June 10, 1815.