| Added_corpname: Geil & Harley |
| Added_corpname: Geil & Jones |
| General_note: There are lists of mining companies, with the locations of their workings, and of salt wells, as well as an inset map of Isle Royale and the data for Michigan from the recent national census. |
| General_note: "made and collected by and under the direction of Geil & Jones and Geil & Harley" |
| Extent: 1 printed map on4 joined sheets |
| Dimensions: 174 x 134 cm. |
| Medium: black ink, with color wash, on paper backed with paper backed with cloth |
| Added_corpname: F. Bourquin & Co. |
