(14) _Westport._--Westport River has also a few oysters. (15) _Taunton River, Coles River and Lee's River._--These rivers once had extensive beds of natural oysters, but now are wholly devoted to growing oysters. Old records and laws show how important these natural beds were, and also furnish an excellent illustration of the effects of overfishing combined with water pollution from manufacturing sources. II. _Decline of the Natural Oyster Beds._--The above-mentioned examples furnish abundant proof that the natural oyster beds of the State, which once were sufficient to supply the wants of our forefathers, have declined to such an extent that at the present time but few natural oysters are tonged for the market. Where there were formerly many acres of excellent native oysters, to-day there is scarcely an acre that can be called good oyster fishing, except in a few cases where the towns maintain a nearly perpetual closed season. No proof of the decline is necessary; it is an established fact. There have been two principal causes which have ruined the natural oyster beds; besides these two,--(1) water pollution and (2) overfishing,--certain geographical changes have doubtless occurred, which have accelerated the decline. (1) _Water Pollution._--The effect of water pollution through the sediment deposited by sewage and manufacturing waste on the natural oyster beds is well illustrated by the destruction of the Charles River beds. This is also shown in a less degree in the Taunton River. (2) _Overfishing._--The primary cause of the decline of the natural oyster beds was overfishing. This is particularly true of the beds south of Cape Cod and in Buzzards Bay, which were of large extent, and unpolluted by manufacturing wastes or sewage. This overfishing has not been the result of the last few years, since records show that as early as 1824 Harwich passed an act to preserve the oyster fishery of the town; and that Sandwich, in the part which is now the town of Bourne, in 1832 passed regulations protecting the natural oyster fishery in Monument River; while at Wellfleet the natural oyster bed was completely exterminated by the year 1775. Overfishing has affected the natural beds in several ways, all of which have worked toward the general decline of the native oyster. (_a_) The first settlers took the large oysters from the natural beds, which under normal conditions had all they could do to keep up the supply. In this way the beds were deprived of the spawning oysters, with the result that in spite of the closed seasons, which gave little if any benefit, a gradual decline set in.