The Archaean Society of Beloit College was organized.

The evidence

• “At a meeting held October 18, 1848, in Fisher, Bundy & Co.'s stone block, the Archaean Society of Beloit College was organized. Joseph Collie, G.”

  1879-history-of-rock-county/15-rock-county-ch09-beloit.md, PDF p. 616

  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