M.I. McCreight:
Banker, Cante Tanka to the Sioux, Conservationist, Author

Entire texts are available on the net at the PSU library site: 
Cook Forest ParkDuBois history
for unclear reasons, the second book is not accessible digitally now
although it is still listed as such; try search
DuBois_title signature

M.I.'s  most substantial book, Firewater and Forked Tongues, can be found in its original hardcover through rare book dealers, and has recently been reprinted in soft cover as well.  Chief Flying Hawk's Tales has also been reissued in paperback.

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