Here was a fine promise of reward for ingenuity, and the low dunes of the north shore of the Cape offered ground made for the enterprise. Men there “tinkered” and “contrived” and improved one upon the work of another, until in 1799 Captain John Sears, of Dennis, who had been early in the field with a device known as “Sears’s Folly,” patented the perfected machine to obtain pure salt by means of sun evaporation which was to bring wealth to many of his neighbors. The industry ran well into the next century when importation became the cheaper method, and at its height companies from Billingsgate to Yarmouth employed some two millions of capital in the business. Many an old sea-dog, also, ran “salt-works” for his private profit, and the dunes of the inner bay were dotted with groups of the surprising peaked-roof structures on stilts that had the look of Polynesian villages. These roofs capped shallow vats into which the water was pumped by tiny windmills. A simple mechanism borrowed from ship-lore that could be worked by the turn of a hand swung a roof back to expose the vat to the sun, and into place again to protect it from rain and dew. Provincetown made the salt for its fish-curing, and it is said that the crescent shore of the harbor was lined for miles with the whirring windmills. Not many years ago a few of the picturesque little buildings and their mills could still be seen on the dunes; but before the mid-eighteen hundreds, the business, as such, was at an end. II The First Comers, after they had established their farms, quickly turned to the sea for the profit there was in it: for since Cabot’s voyages, and before, men had known of the riches that lay there, and the earliest history of the Atlantic coast is that of its rival fisheries. Cabot encouraged English fishermen by report of “soles above a yard in length and a great abundance of that kind which the savages call baccalos or codfish.” France exploited the Newfoundland fisheries, and by 1600 fully ten thousand men were employed catching, curing, and transporting the fish: one old Frenchman boasted that he had made forty voyages to the Banks. Holland pushed into the trade to such effect that men said Amsterdam was built on herring bones and Dutchmen made of pickled herring. The law of the road, at sea, was a hard law, and fishermen fought out their quarrels there without benefit of clergy. In 1621, when the Fortune made her landfall and Nauset Indians warned Plymouth of a strange boat rounding the Cape, it was because of the suspicion that it might be a Frenchman bent upon mischief. The Old Colony was to bear no small part in England’s game of edging out competitors on the sea. Plymouth was quick to estimate the value of those rich fishing-grounds in the lee of Cape Cod, where Gosnold’s chronicler Brereton was “persuaded that in the months of March, April, and May there is better fishing and in as great plenty as in Newfoundland,” and, as we have seen, used the