PREFACE. ix 
merits, these drawings are — what alone they 
claim to be — faithful representations of the scenes 
and objects they depict. In the "List of Illus- 
trations" it will be found to which of the two 
brothers each drawing may be respectively at- 
tributed. 
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 especially due ; I refer to Professors 
Rolleston, Westwood, and Oliver, Dr. Albert Gtin- 
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 able Assistant Secretary 
of the Royal Geographical Society, to whose kind- 
ness I am deeply indebted for many valuable 
suggestions and much practical assistance. The 
four beautiful plates which accompany Professor 
