PREFACE. xv 



merits, these drawings are — what alone they 

 claim to be — faithful representations of the scenes 

 and objects they depict. In the "List of Illustra- 

 tions " it will be found to which of the two brothers 

 each drawing may be respectively attributed. 



And now there only remains to me the pleasing 

 duty of returning my warmest thanks to the many 

 friends who have helped me with my task. To 

 those gentlemen who have contributed the valuable 

 papers which form the Appendix to this volume, my 

 thanks are specially due ; I refer to Professors 

 Rolleston, Westwood, and Oliver, Dr. Albert Giin- 

 ther, Mr. R. Bowdler Sharpe, and Mr. J. G. Baker. 

 And in this connexion I have also to thank Captain 

 G. E. Shelley, who named the majority of the birds 

 in my late brother's collection before they passed 

 into the hands of Mr. Sharpe, to be permanently de- 

 posited in the British Museum. From all of these, 

 and especially from Mr. Sharpe, I have received, 

 besides, much friendly help and advice with refer- 

 ence to the general arrangements of the volume, 

 as I have proceeded with my labours ; as well, 

 also, as from Mr. H. W. Bates, the well-known 

 Assistant Secretary of the Royal Geographical 

 Society, to whose kindness I am deeply indebted 

 for many valuable suggestions and much practical 

 assistance. The four beautiful plates which ac- 

 company Professor Westwood's paper have been 



