Complex sentence: Representative Preston Brooks, Butler's nephew, was infuriated, intended to challenge Sumner to a duel, and consulted with fellow South Carolina Representative Laurence M. Keitt on dueling etiquette.
Split into simpler sentences: Representative Preston Brooks, Butler's nephew, was infuriated. He later said that he intended to challenge Sumner to a duel, and consulted with fellow South Carolina Representative Laurence M. Keitt on dueling etiquette.