The Northwestern Mutual Life Insurance Company was organized at Janesville.

The evidence

• “Waterman served on our board of education. He was one of the original members of the Northwestern Mutual Life Insurance Company, now of Milwaukee, but organized in 1861 at Janesville, Wis., and was a trustee from the beginning and as long as he lived. Of Beloit College he was a trustee from 1856 to 1902 and was its treasurer from 1869 until his departure from Beloit in 1877.”

  1908-brown-rock-county/06-history-of-beloit.md, Vol. 1, PDF p. 178 / book p. 161

  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