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A survey map of a western portion of Rockland Township and a southern portion of Ontonagon Township in Ontonagon County, Michigan, measured in 1847.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.

Notes from the internal lines survey of Rockland and Ontonagon Townships, Ontonagon County, Michigan. Notes were compiled in 1847 by Sylvester W. Higgins.