D. I. Daniels held office from 1847 to 1849.

The evidence

• “David I. Daniels, 1847-49.”

  1908-brown-rock-county/32-courts-and-legal-profession.md, Vol. 2, PDF p. 212 / book p. 716

  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