The overhanging crag, near the southern side of the arch, will in another half-century or more tumble also into the ravine. One large pine tree and many bushes, growing on this leaning tower, are plying their roots deeply in the marble fissures, and are slowly splitting the rock asunder. I have designated this pile Captain Skipper’s Monument, in memory of him who recorded the last evidences of the Beaver Dam across this stream. Tradition says that the beavers labored centuries before the white man arrived in the Mayunsook Valley, building better than they realized, since they erected a dam which stopped the rippling flow of Hudson Brook. Originally, this stream flowed nearer the surface of the Natural Bridge. It is believed by some that the dam clogged the driftwood from the domes, and thus set the waters back. The force of the eddies, combined with the chemical action of the waters whirling among the logs and rocks, eroded dimples in the soft marble, until they wore the present archway through. [Illustration: =The Marble Arch of the Natural Bridge, North Adams, Massachusetts.= “Our own country furnishes antiquities as ancient and durable, and as useful, as any; rocks at least as well covered with lichens, and a soil which, if it is virgin, is but virgin mould, the very dust of nature. What if we cannot read Rome, or Greece, Etruria, or Carthage, or Egypt, or Babylon, on these; are our cliffs bare?”—THOREAU.] I followed down the bed of the stream, stepping from rock to rock easily, until I reached the path far below the Marble Quarry, and entered The Beaver, a little village where every one works like the small animals for which it is named. I was now near the junction of Hudson Brook and the Mayunsook; and not wishing to return to the City until sunset, I scrambled up the slippery sides of the hemlock hills above the little river. With the echo of the cavern’s tumultuous roar still in my ears, I now heard, in pleasant contrast, the distant gentle murmur of that flowing stream. When I departed from the vales of these talking streams, I carried with me back to the busy world the remembrance of the voicing fantasies of their songs of wilderness and solitude. XIX Orange Mountains, and Salt Meadows, New Jersey The weapons with which we have gained our most important victories, which should be handed down as heirlooms from father to son, are not the sword and the lance, but the bush-whack, the turf-cutter, the spade, and the bog-hoe, rusted with the blood of many a meadow, and begrimed with the dust of many a hard fought field.—THOREAU, _Excursions_. August 12th I started for the Orange Mountains, in search of Cardinal Flowers, and various other blossoms, which I hoped to find about Eagle Rock. Arriving at those ragged cliffs, overhanging the brow of the mountains above West Orange, I climbed up the winding stone stairs and entered the park. The woods were strewn with small yellow flowers and ferns.