6 The American Geologist. January, 1903. 
In the closing months of 1850, after completing the North 
Wales sections and maps and putting on the final touches in 
conjunction with Sir Andrew Ramsay, Selwyn was entrust- 
ed with field work in Anglesey where they crossed and car- 
ried on the work begun by Sir Henry de la Beche. It was in 
Anglesey that Selwyn detected the unconformity of the lowest 
Cambrian strata upon an older Pre- Cambrian series of schists. 
In this view Sir Henry supported Selwyn, but Ramsay on this 
occasion differed, so that when the map was published no Pre- 
Cambrian rocks were shown. In the following year (1851) 
Selwyn was back at Dolgelly, checking a number of points and 
investigating critical parts of the complex geological structure. 
Selwyn was of a bright and cheery disposition and be- 
sides the happy re-unions held in London on the part of the 
"Royal Hammerers" as they styled themselves, Ramsay, Sel- 
Avyn, Aveline, Jukes and other geologists of Wales along 
with their contemporaries, the annual dinners of the Survey 
were events in which; a jolly time was spent: Ramsay in re- 
cording Selwyn's presence at the dinner held 15 January, 
1851 says: "And Oh! wasn't it a jolly dinner!" 
In 1852 before completing the whole task of mapping the 
regions examined by him in England and Wales, Selwyn took 
unto himself a wife, as had also many of his colleagues, mar- 
rying Matilda Charlotte, daughter of the Rev. Edward Sel- 
wyn, rector of Hemmington Abbotts, Hunts, and in the fol- 
lowing year he was appointed by the Colonial Office director 
of the geological survey in the newly formed colony of Vic- 
toria, Australia, which^ had come into great prominence ow- 
ing to its wonderful goldfields. 
His training in the older Palaeozoics or Cambi-ian rocks 
of Wales was of special value to him in the new colony, and 
accordingly he set himself to the task of mapping out the gold 
bearing rocks and auriferous gravels of different ages, and in 
tracing their relations to other rocks of the district. 
Here he had a field of work nearly twelve times greater 
than he had in Wales ; V^ictoria, the smallest of the Australian 
Colonies, having an area of 87,884 square miles, whilst Wales 
has a total area of 7,378 square miles only. 
In Australia Selwyn was ably assisted by Messrs. C. S. 
Wilkinson, H. Y. L. Brown, C. B. Brown, Robert Etheridge^ 
