231 
[Upham. 
ference between low and high tide being here about six feet. Peg- 
gotty beach, a third of a mile long, on which many fish-houses and 
moss-houses are built, the latter being used for storage of Irish 
moss or carrageen, connects the Second aud Third Cliffs ; and be- 
tween the Third and Fourth Cliffs an excellently developed shingle 
beach extends nearly one mile, with its crest about fifteen feet 
above mean tide. The drumlins of Third and Fourth Cliffs rise re- 
spectively about 70 and 60 feet above the sea, by whose waves 
the eastern half of each of these hills has been worn away, form- 
ing steep and in large part 
almost vertical sections of the 
till and modified drift, with 
their base at the top of the 
shore of boulders. Third 
Cliff is about two-thirds of a 
mile long, and Fourth Cliff 
one-third of a mile ; and the 
crest of each maintains a 
nearly uniform height along 
the central half of these dis- 
tances, coinciding approxi- 
mately with the extent of 
their included beds of modi- 
fied drift. These four hills 
are doubtless to be classed 
as drumlins, although they 
have not so steep slopes nor 
so distinct trends as com- 
monly mark the contour of the drumlins of Nantasket, Hingham, 
Boston Harbor, and all the vicinity of this city, instead of which 
they rise, so far as their original outlines remain, in nearly round, 
smooth, low domes, surrounded on all sides by low land, marsh, 
or sea. 
If only the surface of these drumlins was known, they would be 
supposed to have the usual structure, consisting only of till, for 
this forms their entire surface, with plentiful boulders up to five 
feet in diameter and occasional larger boulders up to the size of 
eight or ten feet. But the sections of Third and Fourth Cliffs, 
worn away by the Atlantic which beats heavily upon them during 
Fig. 1. Map of portions of Scituate and 
Marshfield, Mass. 
