CHAP. xxn. MR: JAMIESON'S LETTER. 387 



the valley gravel, it seemed to me to be less developed, 

 even in proportion to the size of the rivers, than it is 

 in other districts. There is some of it, however ; and I 

 agree with you in saying, as I do in my paper, that what 

 does occur, appears to be the product of the rivers and 

 streams cutting through the drift. 



" I wish you would take a run, some time, along the 

 northern seaboard of Sutherlandshire, and note the 

 appearances presented by the valleys of the various 

 mountain streams that join the sea. It would be desir- 

 able to ascertain whether any moraine-like heaps 

 present themselves in such places, where you approach 

 the mountains. On going along the east side of Suther- 

 land, I noticed that the features of the county differed 

 from those of Caithness. Great piles of gravel, arranged 

 in mounds and abrupt hillocks, present themselves at 

 the entrance of the valleys, and come down close .upon 

 the sea, as is well seen at Brora. Now, it would be 

 interesting to know if similar phenomena also occur 

 along the north coast. 



" The meeting of the Caithness plains with the high 

 hills of Morven, the Pap, and the Scarabens, should also 

 be investigated, in order to see whether any drift from 

 north or north-west overlaps their base, or whether, on 

 the other hand, the de'bris of these mountains protrudes 

 in the form of moraine-like ridges. Foreign boulders 

 should also be searched for on these hills. P^ach tells 

 me he saw hardly any. I walked along the Berridale 

 glen from the base of the Scarabens to the sea, but did 

 not manage to get round the northern base. I will 



