vill PREFACE 
dens, Kew; others have been given to the British 
Museum and to the Botany School, Cambridge. 
Rock specimens were divided between the British 
Museum and Cambridge. The majority of the 
fossil plants, of which nearly 1000 specimens were 
obtained, will be sent to the British Museum after 
their description has been completed; the rest will 
be kept at Cambridge. 
I am grateful to my friends Mr Peace, the Uni- 
versity printer, and Mr S. C. Roberts, Secretary 
to the Syndics of the Press, for many helpful 
suggestions and for the interest they have taken in “— 
the publication of this book. 
I am indebted to my wife for the drawings 
reproduced in Figs. 12 and 46, which were made 
from my rough sketches, and to my daughter 
Phyllis for Map B and the Chart reproduced on 
page 24. To Mr Holttum I am indebted for the 
photographs reproduced in Figs. 9, 18, 22, 25-31, 
44, and to Mr Erling Porsild for Figs. 23 and 43. 
Fig. 1 is froma photograph taken by the Greenland 
photographer, John Moller, of Godthaab. With 
these exceptions the figures are from negatives 
taken by myself with a Kodak camera. 
A. C. SEWARD 
August 5, 1922 
