Commercial letters predominantly between wholesale dealers and Benjamin Clapp and associates, variously known Wilson & Clapp, Clapp & Beattie, Clapp & McMurray, and B. Clapp & Son. Frequent wholesalers in correspondence with Clapp and associates include A. Burch; Albany Steam Flour Mill and Elevator; Draper, Baker & King (later Draper, Baker & Co.); Ege & Otis; E. McMurray; F. Bishop; O. Boutwell & Son; and Rockwell & Higley. Topics of correspondence include produce market price updates, orders, and and confirmations of receipt. Also includes circulars from wholesale and retail dealers.