ANNIVERSARY ADDRESS. be 
the Geological Survey from Bass’ Straits northwards, including 
the districts of Geelong, Bacchus Marsh, Werribee, Ballan, Steiglitz 
Meredith, and Leigh River. The geology of these districts is a 
‘sort of epitome of that of the whole Colony, and studied as it was 
under the guidance of Mr. Selwyn and Mr. Daintree, proved to 
be a most important school for the young geologist, and one that 
he made the best possible use of. In 1863 Mr. Wilkinson with 
Mr. R. A. F. Murray who is now Government Geologist for Vic- 
toria, as field assistant, was dispatched in charge of a party to 
survey and explore the then almost unknown Cape Otway Moun- 
tains, which consist of oolitic and coal formations. Amongst 
the interesting discoveries made during this period was a new 
phocodon or squalodon, which Professor McCoy named Squalodon 
wilkinson, and a description of it was published in the Prodromus 
of the Paleontology of Victoria. 
In 1866 Mr. Wilkinson was appointed to fill the vacancy caused 
by the resignation of Mr. R. Daintree, who left to take charge of 
the Geological Survey of Queensland. In the same year while 
engaged upon the geological survey of the Leigh River, south of 
Ballarat, Mr. Wilkinson made a most careful investigation relat- 
ing to the depusition of gold, and the formation of gold nuggets, 
a work of great value, which was embodied in a paper read 
before the Roya] Society of Victoria, which paper has been 
referred to by Sir Roderic Murchison, Prof Ulrich, and others. 
At this time, Mr. Wilkinson was prostrated by a severe attack of 
inflammation of the lungs, brought on by a cold caught while 
working with Mr. Selwyn at the geology of the Grampian Moun- 
tains, and in 1868 he resigned his appointment in order to take a 
much needed rest, and he continued without official position for 
four years, the greater part of which time was spent at Wagga 
Wagga, in this Colony, where he regained his health and decided 
to join the Survey Department here. He came to Sydney in 1872, 
passed the examination for a license to survey, and was appointed 
licensed surveyor and sent by the then Surveyor General Mr. P. 
F. Adams, to make some surveys in the newly discovered tin 
