Rock County was divided into three assessment districts; Samuel B. Cooper, George Williston and A. [name cut] were appointed assessors.

The evidence

• “In 1840 the county was divided into three assessment districts and Samuel B. Cooper was appointed assessor for the first district, George Williston for the second district and A.”

  1908-brown-rock-county/09-county-government.md, Vol. 1, PDF p. 257 / book p. 235

  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