192 T. W. E. DAVID AND F. B. GUTHRIE. 



warded them at once to Sydney, with his own notes which 

 we publish. We also communicated with Mr. H. W. Potts, 

 Principal of the Hawkesbury College, Richmond, with a 

 view to securing samples of the flood water and silt of the 

 Hawkesbury River, brought down by the same flood. He 

 also kindly obtained both for us. 



With regard to the Hawkesbury alluvials fewer data are 

 available than in the case of those of the Hunter, The 

 principal crop grown on them is maize ; but lucerne is also 

 grown. 



II. — Bibliography. 

 A number of valuable reports relating to the Hunter 

 Delta have been furnished by the Government Department 

 of Public Works. These deal specially with the subject of 

 flood prevention. The following is a list of these reports : 

 In 18G9 Mr. Moriarty reported to the Works Department. 

 This is a report of special value for the calculation of 

 the amount of flood discharge. 

 In 1870 the report of the Royal Commission on flood pre- 

 vention in the Hunter Valley, was published by the 

 Government. 

 1890, Air. Gordon furnished a report for mitigating floods 

 in the Hunter Valley, which if carried out was esti- 

 mated to cost nearly £1,400,000. 

 Later Mr. C. W. Darley and Mr. H. D. Walsh furnished 



official reports criticising the preceding. 

 In 1897 Mr. Price recommended the building of a huge dam 

 at Denman to mitigate the floods, and in 1899 Mr. 

 Napier Bell reported to the Government on this and 

 other schemes for flood prevention in the Hunter. 

 Mr. R. Etheridge and one of the authors (T.W.E.D.) pub- 

 lished a paper on the Raised Beaches of the Hunter 

 Delta in 1890. 1 



1 Records Geological Survey of N. S. Wales, Vol. n., Pt. ii., 1890, pp. 

 37 - 52, pi. iii. 



