Abstract The John B. Young papers (1898-1901) contain Young's missionary journal and two photocopied certificates. John B. Young (1866-1946) was a convert to the Church of Jesus Christ of Latter-day Saints (LDS Church) from Scotland who settled in Rock Springs, Wyoming, in 1890. Nine years later, he returned to Scotland as a missionary and was companion to David O. McKay, who later became president of the LDS Church.