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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Porter, John Hampden.
    Publication info: New York, C. Scribner's sons, 1894
    Holding Institution: American Museum of Natural History Library
  2. By: Porter, John Hampden.
    Publication info: New York, C. Scribner's Sons, 1909
    Holding Institution: Cornell University Library