On Bowlders. and Rolled Stones. 31 
On this height the peezel | is rounded almost as s perfectly 
as that on the present sea 
discovered by the side of un road, among the weeds and 
bushes, a cavity in the rock, similar to those known to be 
worn by a rapid current of water, aided by the attrition of 
gravel. Nearly one half the cavity at top was er 
distinct, and about three 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 diameter was erfectly circular a lit- 
tle below the top. J could not ascertain the depth of any 
of them, owing to their being in part filled with oe) and 
decayed vegetables. Probably at bottom they are sti 
filled in part with the same gravel that had con tui 
their excavation. The other cavity was much longer | an 
not so perfect. ‘These three cavities are nearly ii ire 
line. and not more than 20 or 30 feet apart. 1 ‘ale 
rock east of these for 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, I may mention 
* pei Ned worn cavity. Eight or ten feet higher than the 
abd 
goood, and like other cavities, known to 
formed by y the action of gravel and water, its diameter 
(as would aturally be the case) increases very regularly and 
gradually as it grows dee eper; 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 
eavity, the rock projects into the hole three or four me 
exactly as those roc s do that are known to be wo 
gravel and water where a part of the rock is harder ies 
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 might doubt- 
less be found here, were it worth the trouble to ‘make the 
examination. The gradual recession of the ocean from 
this re ge ee gt and in some ‘measure its course and 
progr ink. be clearly and distinctly traced 
y fadieelioae still distinctly visible, through Grafton to the 
