[1st Presidency Changes] Brigham Young Heber C. Kimball Daniel H. Wells Joseph F. Smith (Counselor) Joseph F. Smith called as Counselor (1)
-- Jul 1, 1866
Joseph F. Smith, son of Hyrum Smith, is ordained an apostle and member of the Quorum of the Twelve Apostles. (2)
[Joseph F. Smith] Ordained an Apostle and Counselor to the First Presidency. (3)
[Quorum of the Twelve] Joseph F. Smith ordained and simultaneously set apart Counselor to President Brigham Young. (4)
-- Sep 11, 1866
[Lucy Mack Smith] Elias and George A. Smith have the first of five more meetings (the last is 21 September) revising Lucy's history. Apparently no more work is done after this point. (5)
-- Oct 20, 1866
[Apostle John Henry Smith] Marries Sarah Farr, daughter of Lorin Farr, Ogden church and civic leader. (6)
-- 1866
Church Membership at end of year: 77,884
New Converts : 1,113
Percent Change from previous year: 1.45% (7)
The first message was sent on December 1 by the Deseret State Telegraph was completed running from Logan in the north to St. George in the southern part of Utah. (8)
[OREGON TRAIL] For twenty five years, as many as 650,000 people may have pulled up stakes and headed for the farms and gold fields of the West. No accurate records exist of traffic on the great overland trails of that era, and some believe the figure may have been as low as 250,000 people. However, estimates have been slowly creeping upwards over the years, and it now seems that something like half a million people headed west from the 1840s through the Civil War. It is generally agreed that Oregon was the destination for about a third of the emigrants, California for another third, and the remainder were bound for Utah, Colorado, and Montana. This was the last of the so-called Great Migrations. It lasted until the coming of the railroads. (9)
[OREGON TRAIL] Some of the heaviest traffic since the California Gold Rush, but many emigrants are bound for Montana via the Bozeman Trail. 20,000 in '64 and 25,000 in '65 and '66 travel the Trails despite Sioux uprisings at several points along the way. (9)
-- During 1866-1970
[Periodicals] Juvenile Instructor; George Q. Cannon Salt Lake City, Utah (Changed to The Sunday School Instructor 1929) (Periodical) (10)
-- Aug 18, 1867
[Lucy Mack Smith] Daniel H. Wells in a sermon in the tabernacle calls William "a poor, miserable hypocrite." (5)
-- Oct 6, 1867
First General Conference held in new Tabernacle, Salt Lake City. (11)
Footnotes:
1 - Wikipedia, First Presidency (LDS Church), http://en.wikipedia.org/wiki/First_Presidency_(LDS_Church)#Chronology_of_the_First_Presidency
2 - Wikipedia, 19th Century (Mormonism), http://en.wikipedia.org/wiki/19th_century_(Mormonism)
3 - Church of Jesus Christ of Latter-day Saints, Teachings of Presidents of the Church: Joseph F. Smith, Salt Lake City, Utah
4 - Wikipedia, Chronology of the Quorum of the Twelve Apostles (LDS Church), http://en.wikipedia.org/wiki/Chronology_of_the_Quorum_of_the_Twelve_Apostles_(LDS_Church)
5 - Anderson, Lavina Fielding, Editor, Lucy's Book: A Critical Edition of Lucy Mack Smith's Family Memoir, 2001, Signature Books
6 - White, Jean Bickmore, Church, State, and Politics, p.xviii, A John Henry Smith Chronology
7 - Wikipedia, The Church of Jesus Christ of Latter-day Saints Membership History, http://en.wikipedia.org/wiki/The_Church_of_Jesus_Christ_of_Latter-day_Saints_membership_history
8 - History to Go, Pioneers and Cowboys, http://historytogo.utah.gov/timeline/pioneersandcowboys.html
9 - Clackamas Heritage Partners, http://www.historicoregoncity.org/HOC/index.php?option=com_contentview=articleid=107Itemid=75
10 - Ludlow, Daniel H. editor, Encyclopedia of Mormonism, Vol.4, Appendix 3: Church Periodicals
11 - Ludlow, Daniel H. editor, Encyclopedia of Mormonism, Macmillan Publishing, Encyclopedia of Mormonism, Vol. 4, Appendix 2: A Chronology of Church History
Mormon History Timeline /Chronology
http://lds-church-history.blogspot.com/