PREFACE 
“ II n’y a que ccux qui ne font rien quinc 
se trompent pas. 35 — Favre. 
This little book is a practical reply to a number of 
persons who repeatedly ask the writer for some 
information on the Geology of Sydney and the 
Mountains. The only possible reply has hitherto 
been to refer them to a number of reports buried 
away in Blue Books, or to scientific papers scattered 
through the proceedings of various learned societies. 
Many of these papers and reports are now out of 
print. As stores of scientific knowledge, they are 
invaluable, but they have not proved inviting to the 
public generally. 
In the chapters now presented to my readers, 
I have done little more than collect some of the 
scattered information referred to \ but I may claim 
that the method of presenting the subject is my own. 
Primarily, I have considered the needs of the general 
reader, at the same time bearing in mind the wants 
of the student. The book, small as it is, would be 
impossible were it not for the labours of three eminent 
geologists, now alas ! no longer amongst us — Clarke, 
Wilkinson, and Tenison- Woods. I have also drawn 
on the writings of Mr. Robert Etheridge, junr., Curator 
of the Australian Museum, Professor David, of the 
University of Sydney, and Mr. Pittman, the Govern- 
ment Geologist. 
