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IX. A MONOGRAPH OF THE TROCHILIDA OR ‘HUM- 
MING-BIRDS. 
Having from an early period devoted himself to the study of these 
beautiful birds, and acquired a most valuable and extensive collection of 
a group peculiar to America and its adjacent islands, the Author deter- 
mined upon publishing a Monograph of a family unequalled for the 
gorgeous and ever-changing brilliancy of their hues, the variety of their 
form, the singularity of their habits, and the extent of their territorial 
distribution. Anxious to render his represeutations of these lovely objects 
as faithful as possible, the Author instituted a series of experiments upon. 
a new mode of colouring, which has been so far successful that the birds 
are as closely imitated as art can hope to see accomplished ; he has also 
endeavoured, as far as possible, to associate each species with one of the 
plants of its own region, thereby adding an additional charm to a work 
which he trusts will be equally acceptable to the artist and the lover of 
_nature, and which has been so successful that it is perhaps the most 
popular of his productions. 
Complete in five Volumes, price £78 15s. 
X. THE MAMMALS OF AUSTRALIA. 
The Authoyr’s visit to Australia having enabled him to procure much 
valuable information respecting the habits and economy, and many new 
species, of the singular and interesting Mammalia of that country, he has 
determined upon publishing a work on the subject. With respect to the 
importance of such a work no doubt can exist ; and as the author is deeply 
impressed with this idea, so will he endeavour to render it equal to its 
associate publication on the Ornithology of that remarkable region. To 
the Plates every attention, even to the minutest details, has been rendered ; 
and the Authoyr’s original notes and observations have furnished him with 
a store to draw upon for many points of interest. In execution it is pre- 
cisely similar to the ‘ Birds,’ and is completed in Thirteen Parts, each 
containing Fifteen Plates, price £3 3s., or in Three Volumes, price £41. 
This work has been so highly approved of, that by many it is regarded 
as more interesting than the ‘ Birds’ of the same country. 
With the exception of the ‘Handbook to the Birds of Australia,’ all 
the above works are in Imperial Folio, with the Plates and Descriptions 
in the same style, and form a uniform series. 
LONDON: PUBLISHED BY THE AUTHOR, 26 CHARLOTTE 
STREET, BEDFORD SQUARE, W.C. 
August 1873, 
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