1854
Caswell was elected District Attorney of Jefferson County
Nation and worldGrade A · 1 independent source
The evidence
“In 1854 I was elected to the office of District Attorney of the County of Jefferson, I held this office for two years with good success and at the end of my term, I went into the political convention and nominated for the office my friend, Charles R. Gill, who had just settled in Watertown and was new in the profession, to give him a start.”
1900-caswell-reminiscences/10-politics-and-congress.md, PDF pp. 3–27
Caswell, Lucien Bonaparte. The Reminiscences of the Hon. L. B. Caswell. Written at Fort Atkinson, Wis., 1914–1916; four-column newspaper reprint, newspaper and date unidentified. University of Wisconsin-Madison Libraries.
Grade A: Found on a page of one of our sources