The night was fine, clear, and warm, but the radiation so powerful that the grass was coated with ice the following morning, though the thermometer did not fall below 33 degrees. The next day the sun rose with great power, and the vegetation reeked and steamed with the heat. Crossing the river, we first made a considerable descent, and then ascended a ridge to 5,750 feet, through a thick jungle of _Camellia, Eurya,_ and small oak: from the top I obtained bearings of Yalloong and Choonjerma pass, and had also glimpses of the Kinchin range through a tantalizing jungle; after which a very winding and fatiguing up-and-down march southwards brought us to the village of Khabang, in the magnificent valley of the Tawa, about 800 feet above the river, and 5,500 feet above the sea. I halted here for a day, to refresh the people, and if possible to obtain some food. I hoped, too, to find a pass into Sikkim, east over Singalelah, but was disappointed: if there had ever been one, it had been closed since the Nepal war; and there was none, for several marches further south, which would conduct us to the Iwa branch of the Khabili. Khabang is a village of Geroongs, or shepherds, who pasture their flocks on the hills and higher valleys during summer, and bring them down to this elevation in winter: the ground was consequently infested with a tick, equal in size to that so common in the bushes, and quite as troublesome, but of a different species. The temperature rose to 72 degrees, and the black-bulb thermometer to 140 degrees. Magnolias and various almost tropical trees were common, and the herbaceous vegetation was that of low elevations. Large sugar-cane (_Saccharum_), palm (_Wallichia_), and wild plantains grew near the river, and _Rhod. arboreum_ was very common on dry slopes of mica-slate rocks, with the gorgeous and sweet-scented _Luculia gratissima._ Up the valley of the Tawa the view was very grand of a magnificent rocky mountain called Sidingbah, bearing south-east by south, on a spur of the Singalelah range that runs westerly, and forms the south flank of the Tawa, and the north of the Khabili valleys. This mountain is fully 12,000 feet high, crested with rock and ragged black forest, which, on the north flank, extends to its base: to the eastward, the bare ridges of Singalelah were patched with snow, below which they too were clothed with black pines.