117 



Carboniferous-Permian fault, at least within a certain distance of 

 that boundary. 



And I may add with regard to Mr. Kendall's paper, that its 

 merits as a most valuable collection of important facts relating to 

 the coal-field are so great, that, supposing my criticisms on his 

 Whitehaven Sandstone theory to be proved true to the fullest 

 extent, the damage thereby done to the paper would be com- 

 paratively trifling. But of course its very importance obliges me 

 to discuss it here so far as it has any bearing on my subject. 



From looking at the more important lines of fault abutting 

 against those which form the Carboniferous-Permian boundary 

 little or nothing can be learned, inasmuch as it is impossible to 

 guess which fault has a continued existence under the St. Bees 

 Sandstone. Similarly it is impossible to say which of the two 

 boundary lines of fault which meet a little north of Bolton Low 

 Houses, is prolonged under the Permians, or whether both are, or 

 neither. One thing may be mentioned, however, as regards this 

 locality. The coals worked in Bolton Colliery may be looked for 

 beneath the St. Bees Sandstone on the northern side of the 

 boundary fault ; and, indeed, any coals worked anywhere in the 

 coal-field up to that fault may be expected below the St. Bees 

 Sandstone on its other side, at a considerably increased depth. 



In conclusion, I will mention a few things that should be borne 



in mind by any searcher for coal beneath the Permians. First, 



that borings east of Wigton are not likely to be of much use, as 



the measures which will probably be met with, though not entirely 



destitute of coals, are not to be compared in that respect with those 



further west. Secondly, that south and south-west of Wigton 



prudent persons will keep within a mile or thereabouts of the 



[faulted boundary. The advantages of this course, as compared 



[with boring further to the north, are unquestionable. For though 



[we may fairly assume, as I have already remarked, that coals 



[worked up to the faulted boundary on the southern, or upthrow 



side, will be met again on the downthrow, or northern side, at a 



[considerably increased depth, we cannot reckon that this will be 



true a considerable distance from the fault. And a similar remark 



