Stephen Long was appointed second lieutenant in the US Army Engineers December 12, 1814. He became a major in the Topographical Engineers July 7, 1838, and was promoted to Colonel September 9, 1861. He transferred to the Engineers March 4, 1863, and retired June 1, 1863. He passed away in 1864. 
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↑ "New Hampshire, Birth Records, Early to 1900," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/FLPR-XQQ : accessed 03 Dec 2014), Stephen H Long, 30 Dec 1784; citing Hopkinton, Hillsborough, New Hampshire, United States, Bureau of Vital Records and Health Statistics, Concord; FHL microfilm 1001015.
↑ "New Hampshire, Births and Christenings, 1714-1904," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/FDJM-PJW : accessed 03 Dec 2014), Stephen H Long, 30 Dec 1784; citing HOPKINTON TWP,MERRIMACK,NEW HAMPSHIRE; FHL microfilm 1001015.
↑ Ancestry.com. Revised register of the soldiers and sailors of New Hampshire in the War of the Rebellion, 1861-1866 [database on-line]. Provo, UT: Ancestry.com Operations Inc, 2005. Original data: Revised register of the soldiers and sailors of New Hampshire in the War of the Rebellion, 1861-1866. Concord: I.C. Evans, public printer, 1895.
"United States Census, 1850," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M65C-4YY : accessed 03 Dec 2014), Stephen H Long, Louisville, ward 7, Jefferson, Kentucky, United States; citing family 268, NARA microfilm publication M432, NARA microfilm publication M432, National Archives and Records Administration, Washington, D.C.
"United States Census, 1860," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MXCH-MC5 : accessed 03 Dec 2014), Stephen Long, Upper Alton Township 5, 9, Madison, Illinois, United States; from "1860 U.S. Federal Census - Population," Fold3.com; p. 22, household ID 159, NARA microfilm publication M653; NARA microfilm publication M653. National Archives and Records Administration, Washington, D.C.; FHL microfilm 803208.
Kane, Lucile M., Holmquist, June D., and Gilman, Caroly, eds., The Northern Expeditions of Stephen H. Long: The Journals of 1817 and 1823 and Related Documents (Minnesota Historical Society Press, 1978).
 The Cabells and Their Kin: A Memorial Volume of History, Biography, and Genealogy Alexander Brown January 1, 1895 Houghton, Mifflin & Company: Child page 513