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A survey map of a portion of Houghton Township in Isle Royale County, Michigan, measured in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.

Notes from the external lines survey covering boundaries in Isle Royale, Keweenaw County, Michigan (see below for specific townships). These notes were compiled by William Ives in 1847.