Complex sentence: He went on to establish a new merchant house, Wetmore & Company, with Joseph Archer Profit and loss ledgers of William S. Wetmore from 1834-1839 reveal that the primary goods brokered by Wetmore & Co. were tea, tea papers, silks and spices.
Split into simpler sentences: He went on to establish a new merchant house, Wetmore & Company, with Joseph Archer. Wetmore's profit and loss ledgers from 1834-1839 reveal that the primary goods brokered by Wetmore & Co. were tea, tea papers, silks and spices.