INTEODUCTIOjN". xi 



Papuan Sun-birds, including all his lately described species, which were of great assistance to 

 me in verifying the accuracy of my former conclusions, especially of my fifth Part, which had, 

 unfortunately, gone to press ; so that at the time I was unable to acknowledge much of the 

 assistance I derived from his specimens. To Professor Barboza du Bocage I am indebted for 

 being able to examine the new species from the interior of the Portuguese settlements in 

 Angola, and for other valuable assistance, and to Dr. Otto Finsch for assisting me with some 

 very rare specimens, and for placing at my service his original notes upon this family. 



From Australia I received aid from Mr. Ramsay ; and amongst my other supporters I 

 have specially to thank Professor Milne-Edwards and M. Oustalet of the Paris Museum, and 

 M. Bouvier, and in England Professor A. Newton, Mr. E. Newton, Dr. P. L. Sclater, Mr. Salvin, 

 Canon Tristram, Captain Elwes, and Mr. Gould, from all of whom I have received important 

 assistance ; while many other naturalists have supported me in my work, and have my warmest 

 thanks. 



The illustrations, which form such an important portion of my Monograph, have all been 

 executed by Mr. Keulemans, whose name is sufficient guarantee for the accuracy of the details 

 and for high artistic skill. The latter is rendered perhaps more striking from his being 

 acquainted with this family of birds in their native haunts ; and his notes upon the Sun-birds 

 inhabiting Prince's Island have been incorporated in my work. The lithographs have been 

 printed by Messrs. M. and N. Hanhart, the colouring executed by Mr. Hart, whose work is well 

 known to the public as artist in Mr. Gould's publications, and the printing has been done by 

 Messrs. Taylor and Francis ; to all of whom I am obliged for the care and prompt attention they 

 have bestowed in the execution of their special departments. 



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