Served as counselor in First Presidency, 1841–1844, in Nauvoo (D&C124:91).
Richard Bennett, "A Study of The Church of Jesus Christ of Latter-Day Saints in Upper Canada, 1830 - 1850" p. 92 Appendix 3, Provo, Utah Brigham Young University
Filled special mission to Eastern States with Hyrum Smith (Journal History of June 21, 1841) Mission to Philadelphia, 1841, marriage (Joseph Smith Papers Biographies)
William Law and Hyrum Smith went on a mission to the Eastern States (Journal History of September 4 and November 4, 1842)