Thirty or forty years ago, as we were told, it was a sheep-pasture, but the sheep, being worried by the fleas, began to paw the ground, till they broke the sod, and so the sand began to blow, till now it had extended over forty or fifty acres. This evil might easily have been remedied, at first, by spreading birches with their leaves on over the sand, and fastening them down with stakes, to break the wind. The fleas bit the sheep, and the sheep bit the ground, and the sore had spread to this extent. It is astonishing what a great sore a little scratch breedeth. Who knows but Sahara, where caravans and cities are buried, began with the bite of an African flea? This poor globe, how it must itch in many places! Will no god be kind enough to spread a salve of birches over its sores? Here too we noticed where the Indians had gathered a heap of stones, perhaps for their council-fire, which, by their weight having prevented the sand under them from blowing away, were left on the summit of a mound. They told us that arrow-heads, and also bullets of lead and iron, had been found here. We noticed several other sandy tracts in our voyage; and the course of the Merrimack can be traced from the nearest mountain by its yellow sandbanks, though the river itself is for the most part invisible. Lawsuits, as we hear, have in some cases grown out of these causes. Railroads have been made through certain irritable districts, breaking their sod, and so have set the sand to blowing, till it has converted fertile farms into deserts, and the company has had to pay the damages.

This sand seemed to us the connecting link between land and water. It was a kind of water on which you could walk, and you could see the ripple-marks on its surface, produced by the winds, precisely like those at the bottom of a brook or lake. We had read that Mussulmen are permitted by the Koran to perform their ablutions in sand when they cannot get water, a necessary indulgence in Arabia, and we now understood the propriety of this provision.

Plum Island, at the mouth of this river, to whose formation, perhaps, these very banks have sent their contribution, is a similar desert of drifting sand, of various colors, blown into graceful curves by the wind. It is a mere sand-bar exposed, stretching nine miles parallel to the coast, and, exclusive of the marsh on the inside, rarely more than half a mile wide. There are but half a dozen houses on it, and it is almost without a tree, or a sod, or any green thing with which a countryman is familiar. The thin vegetation stands half buried in sand, as in drifting snow. The only shrub, the beach-plum, which gives the island its name, grows but a few feet high; but this is so abundant that parties of a hundred at once come from the main-land and down the Merrimack, in September, pitch their tents, and gather the plums, which are good to eat raw and to preserve. The graceful and delicate beach-pea, too, grows abundantly amid the sand, and several strange, moss-like and succulent plants. The island for its whole length is scalloped into low hills, not more than twenty feet high, by the wind, and, excepting a faint trail on the edge of the marsh, is as trackless as Sahara. There are dreary bluffs of sand and valleys ploughed by the wind, where you might expect to discover the bones of a caravan. Schooners come from Boston to load with the sand for masons' uses, and in a few hours the wind obliterates all traces of their work.