VI. 



PREFACE. 



May the reader, impressed with sentiments of humanity, on 

 viewing the portraits, spare and protect the originals: and 

 when these books shall become obsolete, or be lost in the 

 revolution of time, may some other more able naturalist arise 

 equally inclined to produce better to supply their place. 



Neaecastle-upon-Tyne^ December, 



