DAVIS. 



OUTLINE OF CAPE COD. 



311 



as indicated by its remnants now seen on the west marginal cliff, QH, 

 of High head, and again about six miles to the south, TC, on Bound- 

 brook, Gi-itlitis, and other islands. The cutting qf the west straight 

 cliff, QM, must have continued until the peninsula of Provincelaud 

 began to project northwest to High head. Then, as the movement 

 of the shore currents was somewhat changed by the interference of the 

 peninsula, the middle of the straight cliff was excavated more rapidly, 



Fig. 1. 



forming the west concave shore, TPQ, and the northern part of the 

 straight clilf on High head at the same time came to be protected by 

 the outspringing concave bar, QR, that now encloses East harbor and 

 its marshes on the southwest side. 



The bar, BJ, on the north of High head, is part of the long eastern 

 convex shore line, NBJK, whose form is determined by the masterly 

 Atlantic currents. It is along the outer beach of this bar — or of its 

 representative in former days — that the sands of the peninsula have 

 been transported from the southeast ; this being the conclusion of all 

 observers, unless perhaps of Hitchcock. Now it follows from the re- 



