X PREFA CE 



Mrs. Harry DuflP, whose knowledge of foreign an- 

 guages has enabled her to give me much valuable help 

 in the translation of letters, guide-books, and cata- 

 logues of animals. Indeed, without her kind assist- 

 ance I could scarcely have attempted this work. 



C. V. A. PEEL. 

 Oxford, 



October, 1902. 



