147 
In a walk along the shores of Nantasket, Cohasset, and Scit- 
uate, one observes occasional large bowlders, sometimes local 
and sometimes traveled or truly erratic, but the only one that 
need be specially mentioned is an angular block of coarse, 
massive, pinkish granite, one among a large number of smaller 
masses, on the eastern shore of the Glades, in Scituate, and 
nearly opposite the Osher Rocks. It is about twenty-five feet 
long ; but being of precisely the same lithological character as 
the neighboring ledges, it would, perhaps, eseape partieular 
notice, except for its position, being supported by smaller 
bowlders and the ledge in such a manner that when the tide is 
out one can pass under it from one side to the other. The fact 
that it maintains this insecure position, although exposed to 
the full force of the breakers, testifies to its great weight. 
The best example, however, of a perched block, and one of 
the largest bowlders in Cohasset, is the mass of granite on the 
estate of Mr. Edward Wheelwright west of Little Harbor, 
which has long been known as Tittling Rock (Fig. 20). 
Going north from Cohasset Village on Jerusalem Road, we 
come in about half a mile to the residence of Mr. Wheel- 
wright, whence a private road runs nearly due west for a 
considerable distance through beautiful rocky woodland, 
bringing us, when about two thirds of a mile from the highway, 
to Tittling Bock. The bowlder, which lies close to the road on 
the south, is a rude and somewhat oblique parallelopipedon 
measuring approximately 20 feet in extreme length (north- 
south), 12 feet in breadth, and 12 feet in greatest height. Its 
location is almost the highest point in this part of the peneplain, 
probably 100 feet above the sea. It rests upon a low, 
glaciated ledge of granite sloping gently to the north, seeming 
to lie in a shallow depression or glacial trough ; and the actual 
base or supporting surface is not more than six feet long and 
from two to three feet wide. But although seemingly so 
nicely poised, considerable force would probably be required to 
disturb it; and it is not properly a rocking stone. 
