Who is General Taylor from Personal Memoirs of U.S. Grant and what is their importance?

One of two commanding officers who led Grant during the Mexican War. Grant noted that he was personable but not a conversationalist and that he was a good writer. Taylor, according to Grant, was not overly interested in his appearance and would dress with an eye toward comfort rather than worrying about his appearance. Grant noted that Taylor did not pay particular attention to planning and would often issue orders designed to meet a particular situation rather than having a plan in place. Grant said that Taylor cared little for how his actions might later be presented to those studying the history of the campaigns he led.