| Unidentified photographer/creator Facial Resemblance between Man and Brute Creation 1872 Book illustration Google Books LL/35295 H.J. Rodgers Twenty-Three Years Under a Sky-Light, or Life and Experiences of a Photographer (Hartford: H.J. Rodgers, 1872), p.108.
The title of this engraving has been taken from Chapter X of the book.
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