The Thomas Leiper family business records include “Letterbooks;” “Estate records;” “Paper, lumber and wood business records;” “Quarry business records;” “Tobacco business records;” and “Miscellaneous and household accounts and receipts,” dating from 1771 to 1947. These volumes document the business efforts of Thomas Leiper and his descendants, including the businesses of Thomas Leiper and Sons, Tobacconists; several quarries; a lumber yard and stable; and the Caldwell and Crosby estates. In addition to his other businesses, Leiper bought and sold real estate.