CHAP. XIII. 



FRESWICK BURN. 



169 



winds at least 100 feet over the sea-leveL I looked 

 round and round the little bay, and thought I could dis- 

 cern, on the Duncansby side, a terrace about thirty or 

 forty feet above the present sea-leveL It was the first 

 terrace I had seen. There are no terraces at Thurso. If 

 they ever existed, the encroachments of the sea have 

 obliterated them. 



CK CASTLE AND HEADLAND. 



' The daylight was now good. It had obliterated the 

 light of the moon. At six o'clock I turned into the burn, 

 of Freswick, close under the castle ; and had not pro- 

 ceeded above a gunshot, when I found a low section of 

 blue clay, thickly charged with recent marine fragments, 

 chiefly Cyprina. 



" I passed up the burn, from section to section, and 

 extracted shells out of them all 111 some instances entire 



