October 1851
Caswell attended a term of the Circuit Court of Jefferson County at Jefferson and applied for admission to the bar.
Nation and worldGrade A · 1 independent source
The evidence
“In the month of October, 1851, there was a term of the Circuit Court of Jefferson County to be held at Jefferson. I went to that court and applied for admission.”
1900-caswell-reminiscences/08-hunting-and-outdoor-life.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