The Janesville High School building was erected (at a cost of about $33,000 per one history, $40,000 per the other), and the first class of three was graduated.

The evidence

• “An imperative demand for additional school room secured the erection of the present High School building in 1858, at a cost of about $33,001), and in 1859, with Mr. Cass at its head, the High School was transferred from the Academy building to its present sightly quarters.”

  1879-history-of-rock-county/14-rock-county-ch08-janesville.md, PDF p. 546 / book p. 550

  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

  

• “A demand for more room secured the erection of a high school building in 1858 at a cost of $40,000, and in 1859 the high school department, with Levi Cass as principal, was transferred to its new location.”

  1908-brown-rock-county/12-janesville-schools.md, Vol. 1, PDF p. 284 / book p. 260

  Brown, William Fiske, editor. Rock County, Wisconsin: A New History of Its Cities, Villages, Towns, Citizens and Varied Interests, from the Earliest Times, Up to Date. Chicago: C. F. Cooper & Co., 1908. 2 vols. archive.org/details/rockcountywiscon01brow, archive.org/details/rockcountywiscon02brow.

  Grade A: Found on a page of one of our sources · may repeat 1879-history-of-rock-county, so not counted as independent