Levi Jackman traveled in the 1847 Brigham Young Company and was part of the 13th Company of Ten led by Shadrach Roundy.
Jensen 1834-78: appointed to preach in traveling from Missouri to Ohio. J.H. Sept 10, 1834. Pioneer & Prominent Men of Utah p 955
Journal History 9 July 1835 Autobiography states date he left home on 4 May 1835 to accompany Caleb Baldwin. Returned home on 16 June 1836.
Mission to assist Joseph Smith's presidential campaign and preach the gospel in Illinois. (Journal History, April 15, 1844, p. 2) Levi Jackman wrote a detailed journal of this mission that is shared on his Family Search profile.