L. T. W. KEELE. 
is true that the prospect of obtaining a supply by erecting 
dams in the lower reaches of the Woronora and Port Hack- 
ing Rivers, connecting the reservoirs by a tunnel, was 
inquired into by Mr. Clark, and the Royal Commission of 
1869 devoted some attention to this aspect of the question 
and also to a proposal to obtain a supply from the lower 
reaches of George’s River, but the idea of erecting dams 
in the upper portion of these streams and connecting them 
by tunnelling, does not appear to have occurred to them. 
The advantages of an independent gravitation service, 
capable of expansion to the collection and delivery of so 
large a supply of additional water at high pressure as 50 
million gallons per day, at less cost per million gallons than. 
by the existing works, are so great, that it must now be 
clear that had Mr. Gipps been in possession of the facts at 
the time he was urging the Kenny Hill scheme, he would 
have succeeded, and the Woronora water would have been 
in circulation about the higher areas of the city to day. 
In view of our present knowledge it is fortunate that his 
proposal was not adopted, otherwise we would now be in 
possession of an inferior supply. 
The survey of the schemes from the Woronora River 
were made on my recommendation, by the Metropolitan 
Board of Water Supply and Sewerage, on which the 
preliminary plans and estimates have been prepared, and 
as the surveys of the sites and estimates of the cost of the 
dams on the Cordeaux and Nepean Rivers were made by 
the Royal Commission of 1902, there is nothing more 
required to enable the Public Works Committee to arrive 
at a conclusion as to the source from which the additional 
water supply should be derived, whenever the question 
may be referred to them. 
Disposal of the Waste Water for Irrigation Purposes.— 
Before concluding this history of the Sydney water 
