X 
PREFACE. 
to state, that he will, as heretofore, be willing to aid those 
inquirers who may find difficulty in recognizing the Ferns 
they gather ; and that he will be glad to receive any addi- 
tional information concerning the distribution or variation 
of the species generally, accompanied, when practicable, by 
illustrative specimens. ^ 
Botanic Gardens, Chelsea, London. 
October, 1855 . 
