Apostle Moses Thatcher begins treatment with Keeley Institute for his addiction to opium and morphine. First Presidency and apostles tolerated Thatcher as a "morphine fiend" and "opium eater", but on 26 Jul his family and friends considered involuntary commitment to treatment. His is most prominent drug addict in Mormon history. Twelve drop Thatcher from quorum membership on 19 Nov because of four year conflict over his insubordination in political matters, but Thatcher's drug addiction aggravates that conflict.
[Quinn, D. Michael, The Mormon Hierarchy: Extensions of Power, Appendix 5, Selected Chronology of the Church of Jesus Christ of Latter-day Saints, 1848-1996, http://amzn.to/extensions-power]