An act was approved appointing James Hall, Ezra Carr, and Edward Daniels as geological commissioners.

The evidence

• “Percival, who died in office on the 2d of May, 1856, at Hazel Green. By an act approved March 3, 1857, James Hall, Ezra Carr and Edward Daniels were ■appointed by the legislature geological commissioners. By an act approved April 2, r86o.”

  1879-history-of-rock-county/02-wisconsin-as-a-state.md, PDF p. 95 / book p. 99

  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