212 GEOLOGICAL SURVEY IN SCOTLAND CHAP, vn 



The staff at this time in England consisted of Sir 

 Henry de la Beche, Director-General ; A. C. Ramsay, 

 Local Director for Great Britain ; W. T. Aveline and 

 H. W. Bristow, geologists; W. H. Baily, J. W. Salter, 

 H. H. Howell, and E. Hull, assistant geologists ; R. 

 Gibbs, general assistant ; and J. Rhind. The Irish 

 staff, under the Local Director, J. Beete Jukes, consisted 

 of W. L. Willson, geologist; A. Wyley, G. V. 

 Dunoyer, F. J. Foot, G. H. Kinahan, S. Medlicott, 

 and J. O' Kelly, assistant geologists ; and James 

 Flanagan and Pierce Hoskins, specimen-collectors. 



The maps and sections of North Wales having 

 been completed and published, the next labour was 

 the preparation of a connected description of the 

 geology of that region. No one but Ramsay could 

 undertake this onerous duty. He was familiar with 

 the Principality from Holyhead to Caermarthen; many 

 square miles of it he had himself surveyed, and he had 

 inspected at various times almost all the rest of the 

 ground. Still he could not be expected to know all 

 the details of tracts which he had not personally 

 mapped. He accordingly applied to his colleagues, 

 more especially to Aveline, Selwyn, Jukes, and Salter, 

 for notes regarding their several districts, and these, 

 together with the memoranda he had himself made, he 

 proceeded to weave into a continuous Memoir. This 

 task continued to be his chief indoor labour for some 

 years. Ill-health eventually seriously delayed its com- 

 pletion, and the Memoir did not finally make its 

 appearance until some twelve years later. To do the 

 editorial work of this volume satisfactorily it was de- 

 sirable that he should plant himself for a time in some 

 central part of the region to be described, so that he 

 might easily verify any doubtful points by actually 





