File:Glessner3678107877 3f5db1c89a O.jpg
Photo is taken from Flicker, where it is posted with "No known restrictions." Given it's age it is clearly Public Domain.
Original at Cornell University Library. http://library24.library.cornell.edu:8280/luna/servlet/detail/CORNELL~3~1~74321~10030008
"There are no known U.S. copyright restrictions on this image. The digital file is owned by the Cornell University Library which is making it freely available with the request that, when possible, the Library be credited as its source."