December 2, 1862
Leonard House resigned; Calvin Reeves resigned as First Lieutenant (December 22 per the roster).
Nation and worldGrade A · 1 independent source
The evidence
“Pratt, promoted Captain; Leonard House, resigned December 2, 1862; Arthur C.”
1879-history-of-rock-county/12-rock-county-ch06-politics-war-record.md, PDF p. 468 / book p. 472
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. 468 / book p. 472) · open the whole page