Complex sentence: He obtained employment in a cotton house, was admitted to a full partnership in the firm in 1868, and in 1871 he founded the house of Inman, Swann and Co., in which he associated himself with his former partners.
Split into simpler sentences: He obtained employment in a cotton house and was admitted to full partnership in the firm in 1868. In 1871 he founded the house of Inman, Swann and Co., in which he associated himself with his former partners.