September 1850
A Female Seminary was organized at Rockford, Illinois, under a charter from the State of Illinois.
Nation and worldGrade A · 1 independent source
The evidence
“This convention approved and adopted a charter prepared by one of the committees, and appointed a Board of Trustees, to whom was committed the future development and care of the enterprise. The same Board was also charged with caring for and promoting the Female Seminary to be established in Illinois, near the Wisconsin line, and, in September, 1850, this Seminary was organized at Rockford, under a charter from the State of Illinois.”
1879-history-of-rock-county/12-rock-county-ch06-politics-war-record.md, PDF p. 470 / book p. 474
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. 470 / book p. 474) · open the whole page