PREFACE. 
7 
qualified than I am myself, to give us such a volume, 
feeling sure that it would be welcome to our country- 
men, and add both to the pleasure and to the in- 
terest of their Swiss trips. They were all, however, 
otherwise occupied, but they encouraged me to at- 
tempt it, promising me their valuable assistance, and 
this must be my excuse for undertaking the task, 
perhaps prematurely. Tyndall we have unfortunately 
lost, but Professor Heim and Sir John Evans have 
been kind enough to take the trouble of looking 
through the proofs, and I am indebted to them for 
many valuable suggestions. 
The Swiss Government have published a series 
of excellent maps, which has been prepared at the 
cost of the State, under the general direction of 
General Dufour. There is also a geological map by 
Heim and an older one by Studer and Eschet, 
which was admirable at the time it appeared, and 
has in the main stood the test of more recent le- 
searches. Studer was in fact the father of Swiss 
Geology; he accumulated an immense number of ob- 
servations which have been most useful to subsequent 
