1S76.] 53 [Wright. 



ner over the eastern slope of a large rounded moraine hill coming 

 down to the river road, two miles or more east of the centre of Hav- 

 erhill, thence through East Haverhill, past the old Whittier house, 

 thence, with occasionally less certainty, through Plaistow, N. H., 

 East Hampsteacl, Sanclown, Chester to Auburn past Mr. McDuffee's, 

 and Eaton's Mills, near which the Portsmouth and Nashua Railroad 

 shows a fine section of it. The whole distance of this series now 

 traced is not far from forty miles. As much of these two series of 

 ridges us lies in Massachusetts, is shown in Plate III. 



Rev. W. E. C. Wright has partially investigated an intermediate 

 series, shown also in Plate III. I transcribe his account : 



u There is a well defined ridge like that in Andover to be seen in 

 Danvers. The village of Tapleysville, and the section known as 

 .Dublin, near the crossing of the two railroads, are built on a portion 

 of the ridge much extended to the right and left of the line of direc- 

 tion, the material being generally stratified. It forms the west bank, 

 and the tongue of land on Otis Putnam's lower pond, and the east 

 bank of his upper pond. From near the upper extremity of the 

 upper pond the ridge may be traced, with some gaps, to Beaver 

 Brook Station, near which it crosses both the brook and the railroad. 

 Thence passing through the Lawrence place, it rises out of a large 

 peat meadow back of the Wentworth place, and follows along the 

 slope of a large lenticular moraine hill, nearly to the Newburyport 

 turnpike. Crossing the turnpike near Nichols' brook, it throws out 

 arms to the east, but its main line continues along the slope of an- 

 other large moraine hill in the northeast corner of Middleton, pro- 

 ducing for some distance the appearance of a gigantic raceway. 

 Crossing the valley into Topsfield, it may be traced in broken 

 sections a little behind the Johnson place, till it disappears among 

 high ledges near an abandoned copper mine. It appears again in 

 the right valley of the Ipswich River, half a mile below the Disputed 

 Territory. A mile farther on, it has been found in two or three places 

 this side of the saw-mill on Fish Brook, near where it is joined by 

 the outlet of Crooked Pond. But this part has not been fully 

 explored. 



" The same line of direction extended from Danvers toward the 

 sea will pass gravel ridges at Danversport, and a succession of them 

 between Danversport and the Catholic Cemetery in Salem, and strike 

 the cluster of rounded hills, eurved ridges and enclosed basins in 

 the cemetery in Marblehead, near the Forest Lead Mills, described 



