The hollow of the gorge was much overgrown with bushes and brambles, and along the margin of the noisy stream the grass was high and rank. At the opening of the little valley farthest from where I stood rose an immense oak-tree--the only tree of anything like its size to be seen within a mile--whose wide-spreading branches cast a deep shadow on the earth beneath. So thickly clustered the leaves on the stalwart boughs, and so dark was their tint of green, the whole great tree seemed to have been steeped in night. The gorge, though full of sunlight and verdure, and vocal with the splash of the cataracts, wrought on me even at the first glance an impression of loneliness and desolation. The blue sky seemed farther away from this than from other parts of the earth's surface, and methought the sun shone upon it rather in mockery than in love. Nearly midway down the hollow, and just under the second cataract, hung a huge water-wheel. It hung there motionless, and plainly many a year had passed since it had revolved upon its ponderous axle. It was built of wood, on a clumsy and old-fashioned model, and had become so blackened by age and weather that one might have fancied it charred by fire. Its parts were fastened together with great nails and clamps of iron, the strength of which, however, was now but a deceptive appearance, for the metal was eaten away by red rust, so that a hearty shake would probably have caused the whole structure to tumble into ruin. The rain and snow of unrecorded seasons had spread the rust in streaks and blotches over the swarthy rottenness of the woodwork until I could almost have believed it dabbled with unsightly stains of blood.