December 22, 1862
Calvin Reeves resigned as First Lieutenant.
The evidence
“The roster of Company E as mustered into the service was : Captain, Isaac Miles, resigned June 17, 1863 ; First Lieutenant, Calvin Reeves, resigned December 22, 1862 ; Second Lieutenant, Gage Burgess, promoted First Lieutenant December 2, and Captain July 2, ]863.”
1879-history-of-rock-county/12-rock-county-ch06-politics-war-record.md, PDF p. 463 / book p. 467
Butterfield, C. W., et al. The History of Rock County, Wisconsin: its early settlement, growth, development, resources, etc. Chicago: Western Historical Company, 1879. Cornell University Library via the Internet Archive, archive.org/details/cu31924028871585.
Grade A: Found on a page of one of our sources
On the printed page (PDF p. 463 / book p. 467) · open the whole page “The roster of Company E, as mustered into service, was: Captain, Isaac Miles, of Fulton, resigned June 17, 1863 ; first lieutenant, Calvin Reeves, resigned December 22, 1862; second lieutenant. Gage Burgess, of Janesville, promoted first lieutenant.”
1908-brown-rock-county/16-military-history.md, Vol. 1, PDF p. 378 / book p. 348
Brown, William Fiske, editor. Rock County, Wisconsin: A New History of Its Cities, Villages, Towns, Citizens and Varied Interests, from the Earliest Times, Up to Date. Chicago: C. F. Cooper & Co., 1908. 2 vols. archive.org/details/rockcountywiscon01brow, archive.org/details/rockcountywiscon02brow.
Grade A: Found on a page of one of our sources · may repeat 1879-history-of-rock-county, so not counted as independent
On the printed page (Vol. 1, PDF p. 378 / book p. 348) · open the whole page