Note: Project Gutenberg also has an HTML version of this file which includes the original illustrations. See 29863-h.htm or 29863-h.zip: (https://www.gutenberg.org/cache/epub/29863/pg29863-images.html) or (https://www.gutenberg.org/files/29863/29863-h.zip) At the time this book was written, rats were classified as _Mus rattus_ and _Mus norvegicus_. The genus _Rattus_ did not become standardized until the 20th century. Notes on the animals in Chapter VII are at the end of the e-text, along with the Errata.…
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