148 CANADIAN NIGHTS 



destination, and others again, as I have said, high 

 and dry above the water. In all cases there is a 

 distinct groove or furrow which the rock has clearly 

 ploughed for itself. I noticed one particularly 

 good specimen, an enormous block which lay some 

 yards above high-water mark. The earth and 

 stones were heaped up in front of it to a height of 

 three or four feet. There was a deep furrow, the 

 exact breadth of the block, leading down directly 

 from it into the lake, and extending till it was 

 hidden from my sight by the depth of the water. 

 Loose stones and pebbles were piled up on each 

 side of this groove in a regular clearly defined line. 

 I thought at first that from some cause or other the 

 smaller stones, pebbles, and sand had been dragged 

 down from above, and consequently had piled 

 themselves up in front of all the large rocks too 

 heavy to be moved, and had left a vacant space or 

 furrow behind the rocks. But if that had been the 

 case, the drift of moving material would of course 

 have joined together again in the space of a few 

 yards behind the fixed rocks. On the contrary, 

 these grooves or furrows remained the same width 

 throughout their entire length, and have, I think, 

 undoubtedly been caused by the rock forcing its 

 way up through the loose shingle and stones which 



