1873.] JUDD — -THE SECONDARY ROCKS OF SCOTLAND. 107 



concerning the position of the remarkable rock of Stotfield in Elgin- 

 shire, which contains galena (op. cit. vol. i. pp. 303, 401). 



In 1811 Sir Humphry Davy made an examination of the rocks of 

 Sutherland, especially noticing the strata which are found on the 

 south-eastern coast of the county, and wrote a short account of 

 them. These observations were never published ; but the MS. and 

 the series of specimens collected by the author to illustrate his de- 

 scriptions are preserved in the Duke of Sutherland's Museum at 

 Dunrobin. 



Captain John Henderson's ' General View of the Agriculture of 

 the County of Sutherland,' published in 1812, preserves a copy of 

 one of the sections made during the trials for coal at the Water of 

 Brora (Fascally). 



In 1812 John Farey, sen., the well-known author of the ' Mineral 

 Report on Derbyshire,' and the friend and correspondent of William 

 Smith, made a professional examination of the Sutherland coal- 

 field. His Report, which is in MS., and is dated 29th April, 1813, 

 is a most valuable essay ; it is accompanied by an admirable series 

 of sections and maps ; and in the execution of the whole of these the 

 author has vindicated his claim to be regarded as one of the foremost 

 among the pioneers of geological science. Farey, like Townsend and 

 Richardson, clearly foresaw the important fruit which the discoveries 

 of Smith were destined to produce, and, like them, sought everywhere 

 to apply those principles which his friend taught, and to collect new 

 facts to aid him in his generalizations. Fully recognizing the impor- 

 tance of the study of fossils as characterizing particular rocks, he made 

 collections from several of the Secondary beds in Sutherland, and trans- 

 mitted them to Mr. Sowerby ; some of these fossils were afterwards 

 figured in the ' Mineral Conchology.' Farey was the first to detect 

 the fact that the coal-bearing strata of Sutherland do not belong- 

 to the true Carboniferous system, but are of Secondary age : he also 

 traced clearly the position of the several coal-seams, and the character 

 and effects of some of the principal dislocations to which they have 

 been subjected. To the geologist at the present time Farey's Report 

 is of especial service, preserving, as it does, accurate records of old 

 pits and sections now no longer open ; and I am happy to acknowledge 

 the great services which I have myself received from it. 



In 1819 Mr. Robert Bald laid before the Wernerian Natural- 

 History Society of Edinburgh an account of the Clackmannanshire 

 coal-field, in which he furnishes some details of the peculiarities of 

 the strata scon at Brora. His paper was published in 1821, in the 

 memoirs of the above-named Society (vol. hi. p. 138). 



About this time Mr. George Anderson, of Inverness, an indefati- 

 gable local observer, laid before the Philosophical Society of that 

 town a paper on the Sutherland coal-field, which appears never to 

 have been published ; his experience, however, would seem to have 

 been subsequently placed at the service of Sir Roderick Murchison, 

 who warmly acknowledges the assistance received from him. 



In 1824 Dr. Buckland and Mr. (now Sir Charles) Lyell visited 

 Sutherland, and recognized the fact that the coal-bearing beds were 



