A survey map of the Eastern half of Dundee Township and the Western half of Raisin Township in Monroe County, Michigan, measured between 1809 and 1938.
A survey map of the majority of La Salle Township and small portions of Monroe and Raisin Townships in Monroe County, Michigan, measured between 1820 and 1955.
A survey map of the Northern majority of Berlin Township in Monroe County and portions of Brownstown and Trenton Townships in Wayne County, Michigan, measured in 1817and 1884.
A survey map of Monroe Township in Newaygo County, Michigan. The township lines were measured in 1838, while the subdivision lines were resurveyed in 1856.
Notes from the external lines survey covering La Salle, Monroe, Ida, Bedford, Erie and Whiteford Townships in Monroe County, Michigan, as well as townships in contested territory now in Ohio. Survey notes compiled in 1820 by Joseph Wampler.