1 854 VISIT TO SOUTH OF IRELAND 215 



route to Ireland, where I want to have a touch at the 

 six-inch maps before beginning in Scotland. . . . This 

 Memoir I do not mean to say will be done (with so 

 much at present on my shoulders), but I do hope to 

 finish it next winter and early spring. . . . Were we 

 to go down together next spring [into Wales], and 

 possibly take Jukes and Aveline with us, then putting 

 all our experience and knowledge together, we might 

 through the year produce such results as would throw 

 a strong and steady light on Ireland. I believe that 

 no man single-handed could do so in two or three 

 months, and I believe that if you ask Forbes (if he be 

 in London) he will agree with me, for our opinions, I 

 have observed, always pretty well coincided in such 

 matters.' 



The journey to Ireland referred to in the foregoing 

 extract was chiefly for the purpose of personally in- 

 specting the system of mapping followed by Jukes and 

 his colleagues. From the commencement of the 

 Survey in Ireland maps on the scale of six inches to 

 a mile had been used as the field-maps. In England 

 and Wales the general map on the scale of one inch 

 to a mile had alone been available for geological pur- 

 poses ; but as the six-inch scale was now extended to 

 Scotland, it was proposed to carry on the geological 

 investigation of that part of the United Kingdom on 

 the larger scale. It will be readily understood that 

 the substitution of a map embracing thirty-six times 

 the area of that which had been used in England and 

 Wales would necessitate numerous modifications of the 

 system of mapping applicable to the smaller scale ; 

 much more detail could be expressed and abundant 

 notes could be inserted, which in the case of the one- 

 inch scale required to be written in the note-book. 



