Not less lonely, but far more perilous than the life of the keepers of a light like that on Matinicus is the lot of the crew of the South Shoal lightship, whose position twenty-six miles off Sankaty Head, Nantucket Island, makes it the most exposed light-station in the world. Anchored so far out at sea, it is only during the months of summer and autumn that the lighthouse tender ventures to visit it, and its crew from December to May of each year are wholly cut off from communication with the land. It is this, however, that makes the South Shoal lightship a veritable protecting angel of the deep, for it stands guard not only over the treacherous New South Shoal, near which it is anchored, but over twenty-six miles of rips and reefs between it and the Nantucket shore--a wide-reaching ocean graveyard, where bleach the bones of more than a half thousand wrecked and forgotten vessels. The lightship is a stanchly built two-hulled schooner of 275 tons burden, 103 feet long over all, equipped with fore-and-aft lantern masts 71 feet high, and with two masts for sails, each 42 feet high. The lanterns are octagons of glass in copper frames, so arranged that they can be lowered into houses built around the masts. In the forward part of the ship is a huge fog bell, swung ten feet above the deck, which, when foggy weather prevails, as it frequently does for weeks at a time, is kept tolling day and night. A two-inch chain fastened to a "mushroom" anchor weighing upward of three tons holds the vessel in eighteen fathoms of water, but this, so fiercely do the waves beat against it in winter, has not prevented her from going adrift many times. She was two weeks at sea on one of these occasions, and on another she came to anchor in New York Harbor. Life on the South Shoal lightship is at all times a hard and trying one, and, as a matter of fact, the crew are instructed not to expose themselves to danger outside their special line of duty. This, however, does not deter them from frequently risking their lives in rescuing others, and when, several years ago, the City of Newcastle went ashore on one of the shoals near the lightship, all hands, twenty-seven in number, were saved by the South Shoal crew and kept aboard of her over two weeks, until the story of the wreck was signalled to a passing vessel.