Chateng, a spur from the lofty peak of Tukcham,* ["Tuk" signifies head in Lepcha, and "cheam" or "chaum," I believe, has reference to the snow. The height of Tukcham has been re-calculated by Capt. R. Strachey, with angles taken by myself, at Dorjiling and Jillapahar, and is approximate only.] 19,472 feet high, rises 1000 feet above the west bank of the river; and where crossed, commands one of the finest alpine views in Sikkim. It was grassy, strewed with huge boulders of gneiss, and adorned with clumps of park-like pines: on the summit was a small pool, beautifully fringed with bushy trees of white rose, a white-blossomed apple, a _Pyrus_ like _Aria,_ another like mountain-ash, scarlet rhododendrons (_arboreum_ and _barbatum_), holly, maples, and _Goughia,_* [This fine plant was named (Wight, "Ic. Plant.") in honour of Capt. Gough, son of the late commander-in-chief, and an officer to whom the botany of the peninsula of India is greatly indebted. It is a large and handsome evergreen, very similar in foliage to a fine rhododendron, and would prove an invaluable ornament on our lawns, if its hardier varieties were introduced into this country.] a curious evergreen laurel-like tree: there were also Daphnes, purple magnolia, and a pink sweet-blossomed _Sphaerostema._ Many English water-plants* [_Sparganium, Typha, Potamogeton, Callitriche, Utricularia,_ sedges and rushes.] grew in the water, but I found no shells; tadpoles, however, swarmed, which later in the season become large frogs. The "painted-lady " butterfly (_Cynthia Cardui_), and a pretty "blue" were flitting over the flowers, together with some great tropical kinds, that wander so far up these valleys, accompanying _Marlea,_ the only subtropical tree that ascends to 8,500 feet in the interior of Sikkim. The river runs close tinder the eastern side of the valley, which slopes so steeply as to appear for many miles almost a continuous landslip, 2000 feet high.