The Mentor: American Naturalists. Serial No. 181. Volume 7 No. 9. Department of Science. By Ernest Ingersoll.

Published by The Mentor Association, Inc. June 15, 1919.

Paperback booklet. 12 pages and 5 loose portraits of American naturalists. Paperback magazine. Good condition, shelf worn and still held together.

Feat: John Muir, W. F. Dassonville Photographer, from The John Muir Memorial Library Number of The Sierra Club Bulletin. Henry David Thoreau, from the Rowse Crayon Portrait made in 1854, Now in the Concord Public Library, From the Walden edition of Thoreau’s Writings by courtesy of Houghton Mifflin Company. Ernest Thompson Seton, from a photograph by Pirie MacDonald, New York, Courtesy of the Woodcraft League. John J. Audubon, from a painting by John Woodhouse Audubon and Victor Gifford Audubon in the American Museum of Natural History, New York, By courtesy of the museum. J. Louis Rodolphe Agassiz, from a bust by W. E. Couper, in the American Museum of Natural History, New York, By courtesy of the museum.