PREFACE. v 
My Herbarium continued to increase, not only by 
the addition of specimens from cultivated plants, but 
also of dried specimens received from the principal 
Fern regions of the world, either obtained by direct 
purchase or by presentation, The collection, number- 
ing about 2,000 species—their various sizes and forms 
occupying 6,000 large folio sheets—were, in 1866, 
with the exception of one-third duplicates, purchased 
for the Herbarium of the British Museum. 
In 1846 the Kew Garden collection had increased 
to 400 species, of which I made up a list, published 
in the volume of the “Botanical Magazine” for that 
year. This was followed in 1857 by the publication 
of a “Catalogue of Cultivated Ferns,” 600 species 
being enumerated, 
In May, 1864, in consequence of failing bight, i 
resigned the curatorship of the Royal Botanic Garden. 
X at that time was preparing another catalogue of 
the Ferns in the Kew collection, which was published 
in 1866, under the title of “ Ferns, British and 
Foreign,”* consisting of their History, Organograpys 
. and Classification, including a Treatise on their Cule 5 
tivation. In this work 164 genera are described, each - 
; illustrated by a woodcut, and 1,084 species enumerated, 
: een 56 Lycopods and their allies. The Kew ` 
* A second edition is now in M 
