Little by little the boat voyages after the leviathans extended further into the sea as the industry grew and the game became scarce and shy. The people of Cape Cod were the first to begin the fishery, and earliest perfected the art of "saving" the whale--that is, of securing all of value in the carcass. But the people of the little island of Nantucket brought the industry to its highest development, and spread most widely the fame of the American whaleman. Indeed, a Nantucket whaler laden with oil was the first vessel flying the Stars and Stripes that entered a British port. It is of a sailor on this craft that a patriotic anecdote, now almost classic, is told. He was unhappily deformed, and while passing along a Liverpool street was greeted by a British tar with a blow on his "humpback" and the salutation: "Hello, Jack! What you got there?" "Bunker Hill, d----n ye!" responded the Yankee. "Think you can climb it?" Far out at sea, swept ever by the Atlantic gales, a mere sand-bank, with scant surface soil to support vegetation, this island soon proved to its settlers its unfitness to maintain an agricultural people. There is a legend that an islander, weary perhaps with the effort of trying to wrest a livelihood from the unwilling soil, looked from a hilltop at the whales tumbling and spouting in the ocean. "There," he said, "is a green pasture where our children's grandchildren will go for bread." Whether the prophecy was made or not, the event occurred, for before the Revolution the American whaling fleet numbered 360 vessels, and in the banner year of the industry, 1846, 735 ships engaged in it, the major part of the fleet hailing from Nantucket. The cruises at first were toward Greenland after the so-called right whales, a variety of the cetaceans which has an added commercial value because of the baleen, or whalebone, which hangs in great strips from the roof of its mouth to its lower jaw, forming a sort of screen or sieve by which it sifts its food out of prodigious mouthfuls of sea water. This most enormous of known living creatures feeds upon very small shell-fish, swarm in the waters it frequents. Opening wide its colossal mouth, a cavity often more than fifteen feet in length, and so deep from upper to lower jaw that the flexible sheets of whalebone, sometimes ten feet long, hang straight without touching its floor, it takes a great gulp of water. Then the cavernous jaws slowly close, expelling the water through the whalebone sieve, somewhat as a Chinese laundryman sprinkles clothes, and the small marine animals which go to feed that prodigious bulk are caught in the strainer. The right whale is from 45 to 60 feet long in its maturity, and will yield about 15 tons of oil and 1500 weight of whalebone, though individuals have been known to give double this amount.