Nota :
J. J. Bigsby, "On Geology, etc. of the NW Portion of Lake Huron", AMERICAL JOURNAL OF SCIENCE, vo. III, 1821, Plate II.
Photographs Relating To John Jeremiah Bigsby, His Manuscript, Manuscript Geological And Topographical Maps, His Portrait, 1821 Am. J. Of Science Plate Ii, And His Medal Given By The Geological Society (Of London).