Geological Survey of Great Britain. 229 
lities, and provided with ample mining information ; and as 
the Government, by degrees, better appreciated the import- 
ance of the whole undertaking, not only was Mr Williams, 
who possessed the above requisites in a high degree, ap- 
pointed as assistant geologist to Sir H. Dela Béche, but the 
latter was definitively appointed director of the Geological 
Survey, and received a salary. At short intervals there fol- 
lowed the nomination of three more assistants, Messrs Rees, 
Aveline, and Logan. Mr Logan, at present director of the 
geological survey in Canada, had lived at Swansea, and of 
his own accord surveyed a great part of Glamorganshire, 
with such accuracy, that after an examination of his work, it 
was accepted unaltered by the Geological Survey. In this 
manner the map of Glamorganshire also was soon completed. 
In 1841 Mr Ramsay was appointed assistant on the Geo- 
logical Survey, and with his aid Pembrokeshire and a part 
of Carmarthenshire were finished between that time and 
1845. 
Independently of the investigations in England, a Geologi- 
eal Survey had, in the meanwhile, sprung up in Ireland. In 
consequence of a proposition of Colonel Colby, who had de- 
clared his opinion that the trigonometrical survey of the 
country should give the basis for extended statistical, anti- 
‘quarian, and geological investigations, Captain Pringle was 
instructed to take the direction of the latter. The opera- 
tions were commenced with great zeal simultaneously with 
the trigonometrical survey, but since the desired accelera- 
tion of the geographical maps required the whole force, the 
geological part was placed more in the background and ne- 
glected. 
In 1832 Colonel Colby’s original plan was again taken up 
by Captain Larcom. Particular and ably-written instructions 
were given to all the officers employed on the Trigonometri- 
cal Survey, to direct their attention specially to antiquarian 
and statistical inquiries, whilst Captain Portlock formed a 
separate geological department. Moreover, numerous in- 
vestigations of the fauna and flora of the country were be- 
gun, and in 1835 some of the results were published in the 
Memoir of Londonderry. 
But it was not till 1837 that the geological division re- 
