Shortly after Joseph Smith settled in Far West, Missouri, in March 1838, he had begun preparing for an expanded missionary effort by the Twelve to Great Britain.
Brigham Young was prepared to leave on 14 September, just shortly after his wife, Mary Ann had given birth to a daughter.
On 18 September, Brigham and Heber decided it was time to start on their appointed mission. Both men were so ill that they had to be helped into a wagon.
Elders Young and Kimball were joined en route by George A. Smith. As they traveled Brigham reached into his trunk and always found just enough money for the next stage coach fare. He thought Heber was replenishing the fund, but later discovered that he had not. The brethren had started their trip with $13.50 in donations, yet they spent more than $87 on coach fares. They had no idea how the additional money had gotten into the trunk “except by some unseen agent from the Heavenly world to forward the promulgation of the Gospel.” 7
7. In Arrington, Brigham Young: American Moses, p. 77