First Edition published March 1857. 



Second Edition, MaylSb7 ; Third Edition, August 1857. 



Reprinted March 1861; June 1867; June 1874 ; August 1877 ; 



August 1883 ; March 1893. 



Reissued ivith New Introduction and Coloured Plates, March 1906. 

 Reprinted May 1907. 



