Across the Niho-o-te-kiore plains to the south-east of Horohoro rose the Paeroa mountains to a height of over 1000 feet, hot and quaking with internal fires, boiling mud-pools, and coiling jets of steam that burst with a hissing sound from the deeply-scarred hills. The base of this range, where the thermal action was greatest, was formed of a burnt, fiery-looking earth, broken here and there into enormous fissures, and dotted about with boiling pools and deep holes of hot, seething mud, while clouds of vapoury steam burst forth from the highest peaks. Our route continued across the plains to the native settlement of Orakeikorako, where the swift Waikato wound with many bends through a terraced valley, backed by tall, forest-clad mountains in the distance. Here both sides of the stream were thickly studded with countless steam-jets and hot springs, which produced a singular and beautiful effect as they bubbled and hissed above the sparkling course of the clear, rolling river, whose banks were fringed with thick, clustering masses of pure white silica. Here, too, every foot of ground told of a fiery, subterranean heat. The very rocks around were coloured with the most delicate tints, formed by the chemical deposits of the hot mineral waters, while the great geyser Orakeikorako, from which the village derived its name, just as we were leaving, threw up a column of boiling water to a height of fifty feet, as if to salute our departure. It burst forth, without any previous warning, from a funnel-shaped aperture within a few feet of the margin of the river. From Orakeikorako we passed over pumice plains fringed with rugged mountains and deep gorges. Some of the former were very quaint and fantastic in shape; not a few rose up in the form of pointed cones, while some were flat-topped, with deep sides, from which the white pumice gleamed with a dazzling intensity. The country fell with a gradual incline into the valley of the Waikato; and, after descending into a clear stream by a steep, narrow pass, just wide enough to allow our horses to move along, we crossed the eastern spur of Mount Ngautuku, and reached Atea-Amuri.