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PROCEEDINGS OF THE 



cases of considerable height. On the top of the Craig there are 

 some very large rocks, weather and water-worn, covered with 

 lichens, and what caused ray wonder was how they ever assumed 

 the boulder shape. They cannot be erratic rocks, because they 

 are at home, being part of the rock. If they belonged to some 

 other formation, I could easily understand how they could be 

 transported there, but they belong to the rock, and I cannot 

 account for their presence, except that the various abrading 

 agencies have performed their work, and kept them on their bed 

 at the same time. 



I particularly searched all over the island for any other rock 

 than syenite and trap, but failed, except in two instances. I 

 found on the shore, at the landing-place, some Irish lime, which 

 must have come ashore from some wreck, as must have been the 

 case with a small piece of copper sheathing. 



The other rocks I found were brought to the island by a con- 

 veyance not made by human agency— a means of transit which has 

 been of considerable use in our country before our race occupied 

 it— I mean icebergs. On the north, at the height of about 600 

 feet, I came upon a deposit of boulder clay, which lay in a slight 

 depression, guarded in some degree by a boss of rock from the 

 currents which, when the Craig was submerged, set in from the 

 north-west. In this red earth, composed of sand and clay, I 

 gathered a goodly quantity of pebbles, both large and small, a con- 

 siderable number of which, both from their form and markings, 

 prove that their origin was such as I have hinted, fashioned by the 

 ice-king, and carried hj the iceberg. The pebbles were gathered 

 indiscriminately, as I thought it better to do so than to pick them. 

 About a third of them bear indisputable marks of glacial action, 

 though these marks are, owing to the weathering action of winds 

 and rains, and the careless turnings over of the conies, somewhat 

 rubbed, and a good deal deficient of those finer striee which pebbles 

 gathered in situ would present. The coarser strise are, however, 

 remaining, to prove that they once upon a ftme were firmly planted 

 in the ice that formed the bottom of a glacier, and were pushed and 

 drawn 1)y it as it slid over the rocky bed of the valley through which 

 it flowed, and were thus scratched or scored by the surface over 

 which they moved. Before passing from this part of my observa- 

 tions, I may mention that great heaps of stones of various sizes are 

 piled up, and have streamed down from the lower face of the 



