PREFACE. 
ix 
over woodcuts, that they give a truthful representa- 
tion of the places, without leaving any margin for 
the imagination of the artist ; all these Plates are 
done by the new Heliotype process, from negatives 
which were never very good, and which suffered 
greatly by the rough treatment they were subjected to 
during the march. It should be mentioned that these 
views are all reversed — i.e., the right hand side of the 
picture should have been at the left side, and vice 
versa; this was caused by the negatives having been 
varnished at the time they were done, which prevented 
the film being taken off and reversed. 
The Plates of Birds are all by Keulemans, and with 
scarcely an exception they are all very accurately 
done. 
Pew who have not themselves attempted it can 
realize the difficulty of getting through the press a 
volume like the present, containing such a variety of 
information; notwithstanding all the care that has 
been taken some mistakes may have been over- 
looked. 
