On Bowlders and Rolled Stones, 31 



On this height the gravel is rounded ahnost as perfectly 

 as that on the present sea shore. After some research I 

 discovered by the side of the road, among the weeds and 

 bushes, a cavity in the rock, similar to those known to be 

 worn by a rapid current •( water, aided by ihe attrition of 

 gravel. Nearly one half the cavity at top was very plain, 

 distinct, and about ihree feet in diameter. The other part 

 of the rock had been probably removed by the water. I 

 soon found two other cavities, not ten feet from the path, 

 one about two feet in diamt^ter was perfectly circular a lit- 

 tle below the top. I could not ascertain the depth of any 

 of them, owing to their being in part filled with mud and 

 decayed vegetables. Probably at bottom they are still 

 filled in part with the same gravel that had contributed to 

 their excavation. The other cavity was much longer and 

 not so perfect These three cavities are nearly in a direct 

 line, and not more than 20 or 30 feet apart. The whole 

 rock east of these lor 40 or 50 feet in width has every ap- 

 pearance of having been actually worn away to the depth 

 of between 15 or 20 feet.- 



Among many other proofs of this fact, J may mention 

 another worn cavity. Eight or ten feet higher than the 

 others, and a little back of the middle one; this cavity is very 

 perfect, it is plainly to be seen to the depth of six or seven 

 feet, it is about three feet in diameter at top, apparently 

 perfectly round, and like other cavities, known to be 

 formed by the action of gravel and water, its diameter 

 (as wot Id naturally be the case) increases very regularly and 

 gradually as it grows deeper ; and what makes it still more 

 certain (if possible) that it is the effect of gravel and water 

 is, that about 3 or 4 feet from the top, on one side of the 

 cavity, the rock projects into the hole three or four inches, 

 exactly as those rocks do that are known to be worn by 

 gravel and water where a part of the rock is harder than 

 the rest, which clearly is the case here, as that part of the 

 rock appears of a more compact texture and is of a differ- 

 ent color. Many more similarly worn cavities mi^ht doubt- 

 less be found here, were it worth the trouble to make the 

 examination. The gradual recession of the ocean from 

 this extreme height, and in some measure its course and 

 progress, can, 1 think, be clearly and distinctly traced 

 by indications still distinctly visible, through Grafton to the 



