526 Obituary—C. T. Clough. 
His first work on the Survey was done under the late H. H. Howell 
in the North of England. Teesdale, a district for which he preserved 
a lifelong affection, was the scene of his earliest field-work ; and his 
first paper, printed in the Quarterly Journal of the Geological Society 
in 1876 (vol. xxxil), was on ‘‘ The Section at the High Force, Tees- 
dale”. He continued in Northumberland and Durham for eight 
years, and the results of his work appeared in several Surve 
memoirs, including Otterburn and Elsdon (Sheet 108 8.E.) and Zhe 
English Side of the Cheviot Hills (Sheet 108 N.E.). 
In 1884 the one-inch map of England and Wales was completed, 
and Clough, along with Gunn, Barrow, and Hugh Miller, was trans- 
ferred to Scotland. The survey of the North-West Highlands was 
then beginning, and Clough took part in it, but in the autumn and 
spring seasons he was engaged in surveying the Cowal district of 
Argyllshire. In Sutherlandshire he mapped a large district north 
of Loch Glencoul to Loch Inchard, and subsequently he executed 
the survey of an extensive area around Loch Maree. His description 
of that ground is contained in the Survey memoir on the North-West 
Highlands. When this was completed he worked in Glenelg, the 
north-east part of Skye, and Soay. About 1900 he was transferred 
to Strathcarron, Eastern Ross-shire. In 1902, on the death of 
W. Gunn, Clough became a District Geologist. He continued for a time 
in Ross-shire, and subsequently took charge of the work in northern 
Argyllshire and in Mull. In the spring and autumn seasons he was 
also employed on the revision of the coal-fields which was started in 
1900. His first work of this description was in Haddingtonshire and 
the Lothians coal-field, and when that was completed he was trans- 
ferred to Bo’ness. Subsequently he had charge of the revision of the 
Lanarkshire coal-field in the district south-east of Glasgow (Holytown, 
Motherwell, Airdrie), and finally he superintended the work in the 
North Ayrshire coal-field. 
As time went on he exhibited a certain reluctance to publishing 
geological papers in the transactions of societies and in journals, and 
most of the results of his field-work appeared in Survey memoirs and 
maps. Of these perhaps the best known are the Geology of Cowal 
(1897), Geology of the Neighbourhood of Edinburgh (1910), Geology of 
the Glasgow District (1911), Geology of Ben Wyvis (1912), and the 
Geology of Glenelg (1910). At the time of his death he had two 
important memoirs on hand, viz. The EHconomic Geology of the Central 
Coal-field of Scotland and the Geology of Mull. Dr. Clough had 
contributed to thirteen Scottish and five English memoirs of the 
Geological Survey. 
In field-work and the preparation of maps Dr. Clough found his 
principal interest. Office work and the writing of memoirs and 
scientific papers were more or less irksome to him. He combined to 
an extraordinary degree powers of minute observation, great diligence, 
and enthusiasm. His working day was always a very long one, and 
no difficulties arising from the complexity of the structural features 
of the ground assigned to him ever depressed him. In fact, he revelled 
in the mapping of intricate geology. Some of his field maps of the. 
North-West Highlands, of Mull, and of Central Ayrshire may be 
