He led the fourth handcart company[3] which was one of the two that was stuck in present-day Wyoming in the late autumn of 1856, leading to the death of many of its members. He had previously been the presiding elder over the Latter-day Saints on the Thornton on its journey from Liverpool to Boston.[4] Many of the people on this journey became part of his handcart company.
Later, he was one of the early settlers of Mendon, Utah Territory. He served at times as mayor and postmaster of the town.[5] In 1863, Willie founded the first Sunday School in Mendon. He also served as a counselor in the bishopric and ran a co-operative store.[6]
Willie has been fictionalized in many books, including In the Company of Angels by David Farland.
James G. Willie died on 09 Sept 1895. The entire town of Mendon, Utah turned out for his funeral which was held on 13 Sept 1895.