Essays, Henry David Thoreau [ebook reader with android os txt] 📗

slope, and so measured its height on the shingle. It rises one hundred and ten feet above its immediate base, or about one hundred and twenty-three feet above mean low water. Graham, who has carefully surveyed the extremity of the Cape, makes it one hundred and thirty feet. The mixed sand and clay lay at an angle of forty degrees with the horizon, where I measured it, but the clay is generally much steeper. No cow nor hen ever gets down it. Half a mile farther south the bank is fifteen or twenty-five feet higher, and that appeared to be the highest land in North Truro. Even this vast clay-bank is fast wearing away. Small streams of water trickling down it at intervals of two or three rods have left the intermediate clay in the form of steep Gothic roofs fifty feet high or more, the ridges as sharp and rugged-looking as rocks; and in one place the bank is curiously eaten out in the form of a large semicircular crater.

According to the lighthouse keeper, the Cape is wasting here on both sides, though most on the eastern. In some places it had lost many rods within the last year, and erelong the lighthouse must be moved. We calculated, from his data, how soon the Cape would be quite worn away at this point⁠—“for,” said he, “I can remember sixty years back.” We were even more surprised at this last announcement⁠—that is, at the slow waste of life and energy in our informant, for we had taken him to be not more than forty⁠—than at the rapid wasting of the Cape, and we thought that he stood a fair chance to outlive the former.

Between this October and June of the next year I found that the bank had lost about forty feet in one place opposite the lighthouse, and it was cracked more than forty feet farther from the edge at the last date, the shore being strewn with the recent rubbish. But I judged that generally it was not wearing away here at the rate of more than six feet annually. Any conclusions drawn from the observations of a few years or one generation only are likely to prove false, and the Cape may balk expectation by its durability. In some places even a wrecker’s footpath down the bank lasts several years. One old inhabitant told us that when the lighthouse was built, in 1798, it was calculated that it would stand forty-five years, allowing the bank to waste one length of fence each year, “but,” said he, “there it is” (or rather another near the same site, about twenty rods from the edge of the bank).

The sea is not gaining on the Cape everywhere: for one man told me of a vessel wrecked long ago on the north of Provincetown whose “bones” (this was his word) are still visible many rods within the present line of the beach, half buried in sand. Perchance they lie alongside the timbers of a whale. The general statement of the inhabitants is, that the Cape is wasting on both sides, but extending itself on particular points on the south and west, as at Chatham and Monomoy Beaches, and at Billingsgate, Long, and Race Points. James Freeman stated in his day that above three miles had been added to Monomoy Beach during the previous fifty years, and it is said to be still extending as fast as ever. A writer in the Massachusetts Magazine, in the last century, tells us, that, “when the English first settled upon the Cape, there was an island off Chatham, at three leagues’ distance, called Webb’s Island, containing twenty acres, covered with red-cedar or savin. The inhabitants of Nantucket used to carry wood from it”; but he adds that in his day a large rock alone marked the spot, and the water was six fathoms deep there. The entrance to Nauset Harbor, which was once in Eastham, has now travelled south into Orleans. The islands in Wellfleet Harbor once formed a continuous beach, though now small vessels pass between them. And so of many other parts of this coast.

Perhaps what the ocean takes from one part of the Cape it gives to another⁠—robs Peter to pay Paul. On the eastern side the sea appears to be everywhere encroaching on the land. Not only the land is undermined, and its ruins carried off by currents, but the sand is blown from the beach directly up the steep bank, where it is one hundred and fifty feet high, and covers the original surface there many feet deep. If you sit on the edge, you will have ocular demonstration of this by soon getting your eyes full. Thus the bank preserves its height as fast as it is worn away. This sand is steadily travelling westward at a rapid rate, “more than a hundred yards,” says one writer, within the memory of inhabitants now living; so that in some places peat-meadows are buried deep under the sand, and the peat is cut through it; and in one place a large peat-meadow has made its appearance on the shore in the bank covered many feet deep, and peat has been cut there. This accounts for that great pebble of peat which we saw in the surf. The old oysterman had told us that many years ago he lost a “crittur” by her being mired in a swamp near the Atlantic side, east of his house, and twenty years ago he lost the swamp itself entirely, but has since seen signs of it appearing on the beach. He also said that he had seen cedar-stumps “as big as cartwheels” (!) on the bottom of the Bay, three miles off Billingsgate Point, when leaning over the side of his boat in pleasant weather, and that that was dry land not long ago. Another told us that a log canoe known to have been buried many years before on the Bay side at East