3 Muellers in patron list - 1875 atlas
The 1875 Atlas lists as patrons:
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Town of Herman: Henry Mueller, Section 35, from Germany in 1847, proprietor of grist & saw mill.
Town of Rhine: John Mueller, Section 2, from Germany in 1848.
Town of Wilson: Samuel Mueller, Section 33, from Germany in 1854.
This was not indexed, so I may have missed someone.