On the west side of this deposit, about one-third of the way up the White Mountain from the river and terrace, where was once the theatre of many active springs, old chimneys or craters are scattered thickly over the surface, and there are several large holes and fissures leading to vast caverns below. The crust gives off a dull hollow sound beneath the tread, and the surface gives indistinct evidence of having been adorned with the beautiful pools or basins already described. At the base of the principal terrace is a large area covered with shallow pools some of them containing water, with all the ornamentations perfect, while others are fast going to decay, and the decomposed sediment is as white as snow. On this sub-terrace is a remarkable cone about 50 feet in height and 20 feet in diameter at the base. Its form has suggested the name of Liberty Cap. It is undoubtedly the remains of an extinct geyser. The water was forced up with considerable power, and probably without intermission, building up its own crater until the pressure beneath was exhausted, and the spring gradually closed itself over at the summit and perished. No water flows from it at the present time. The layers of lime were deposited around the cap like the layers of straw on a thatched roof, or hay on a conical stack. Not far from the Liberty Cap is a smaller cone, called, from its form, the "Bee-hive." These springs are constantly changing their position; some die out, others burst out in new places. On the northwest margin of the main terrace are examples of what have been called oblong mounds. There are several of them in this region, extending in different directions, from fifty to one hundred and fifty yards in length, from six to ten feet high, and from ten to fifteen feet broad at the base. There is in all cases a fissure from one end of the summit to the other, usually from six to ten inches wide, from which steam sometimes issues in considerable quantities, and on walking along the top one can hear the water seething and boiling below like a cauldron. The inner portion of the shell, as far down as can be seen, is lined with a hard, white enamel-like porcelain; in some places beautiful crystals of sulphur have been precipitated from the steam. These mounds have been built up by a kind of oblong fissure-spring in the same way that the cones have been constructed. The water, continually spouting up, deposited sediment around the edges of the fissure until the force was exhausted, and then the calcareous basin was rounded up something like a thatched roof by overlapping layers.