Royal Geographical Society: Sources of the Mississippi.
Overall size 21,5 x 22,5 cm; image 19,5 x 20,5 cm. fold as issued; edges frayed; some slight discolouration; p[late slightly rubbed; small left margin; very small tear top margin; o/w vg cond.
This map was published in the Journal of the RGS. The map shows the area between Itasca Lake, Leech Lake, Cass Lake and Lac Traverse.