during stream-tides, that would otherwise have laid its bottom bare--a proof, he used to say, that the German Ocean, from its want of breadth, could not be heaped up against our coasts to the same extent, by the violence of a very powerful east wind, as the Atlantic by the force of a comparatively moderate westerly one. It is not improbable that the philosophy of the Drift Current, and of the apparently reactionary Gulf Stream, may be embodied in this simple remark. The woods on the lower slopes of the hill, when there was no access to the zones covered save at low ebb by the sea, furnished me with employment of another kind. I learned to look with interest on the workings of certain insects, and to understand some of at least their simpler instincts. The large Diadem Spider, which spins so strong a web, that, in pressing my way through the furze thickets, I could hear its white silken cords crack as they yielded before me, and which I found skilled, like an ancient magician, in the strange art of rendering itself invisible in the clearest light, was an especial favourite; though its great size, and the wild stories I had read about the bite of its cogener the tarantula, made me cultivate its acquaintance somewhat at a distance. Often, however, have I stood beside its large web, when the creature occupied its place in the centre, and, touching it with a withered grass stalk, I have seen it sullenly swing on the lines "with its hands," and then shake them with a motion so rapid, that--like Carathis, the mother of the Caliph Vathek, who, when her hour of doom had come, "glanced off in a rapid whirl, which rendered her invisible"--the eye failed to see either web or insect for minutes together. Nothing appeals more powerfully to the youthful fancy than those coats, rings, and amulets of eastern lore, that conferred on their possessors the gift of invisibility. I learned, too, to take an especial interest in what, though they belong to a different family, are known as the Water _Spiders_; and have watched them speeding by fits and starts, like skaters on the ice, across the surface of some woodland spring or streamlet--fearless walkers on the waters, that, with true faith in the integrity of the implanted instinct, never made shipwreck in the eddy or sank in the pool. It is to these little creatures that Wordsworth refers in one of his sonnets on sleep:-- "O sleep, thou art to me A fly that up and down himself doth shove Upon a fretful rivulet; now _above_, Now _on_ the water, vexed with mockery."