Western Himalaya and Tibet / A Narrative of a Journey Through the Mountains of Northern India During the Years 1847-8

by Thomas Thomson

The streams which the road here crosses descend from different parts of the ridge of Nagkanda. They occupy the bottom of deep ravines, and are in their whole course densely wooded. These ravines are, in their upper part especially, extremely steep and rocky, often with precipitous walls, and scarcely practicable even on foot. The denseness of the forest is principally due to their northern exposure, and to the consequent more equable temperature and greater humidity. They contain many trees not previously observed on the journey from Simla, though all of them, I believe even the horse-chesnut, occur in the very similar steep rocky ravines below Fagu. The alder is a common tree at 4-5000 feet in the north-western Himalaya, always in valleys and on the banks of streams.

In this shady forest I collected a considerable number of plants which do not occur at Simla. A scandent Hydrangea, the loosely-adhering bark of which separates in long rolls like that of the birch, and is used as a substitute for paper, was seen twining round the trunks of trees. I observed also a fine Calanthe, and abundance of Adenocaulon, a remarkable genus of Compositæ, which, till Mr. Edgeworth discovered a species in the Himalaya, was only known as a native of South America. In the thickest part of the forest in this ravine, I was also fortunate enough to meet with a few specimens of Balanophora, which here probably attains its western limit. All these plants are abundant forms in the most humid parts of Nepal and Sikkim, and their presence may, I think, be regarded as indicative of a more equable temperature throughout the year than prevails in the more open parts of the Sutlej Himalaya. The range of mountains on which Nagkanda stands certainly intercepts a great deal of moisture during the rainy season, and therefore makes the valleys on its northern aspect less humid at that period of the year. This would appear to be more than counterbalanced by the effect of the dense forest in keeping up moisture and preventing radiation during winter, for the cold and dryness of that season seem to have a much greater effect in determining the cessation of the forms characteristic of the eastern Himalaya, than the diminished rain-fall during the three months of the rainy season.

KOTGARH.
August, 1847.

After crossing the stream at the bottom of the valley, the road advances in a northerly direction, at first gradually ascending through fine shady woods, but afterwards, turning to the right, mounting rapidly by very abrupt zigzags, up a bare dry hill-side, to the Kotgarh ridge. Here we took up our quarters for the night, in a house the property of Captain P. Gerard, a little above the village of Kotgarh, at an elevation of about 7000 feet, in a fine grove of Pinus excelsa.

Kotgarh, a large village, and the seat of an establishment of missionaries, was at one time a military post, and is interesting to the Himalayan traveller, from the fact of the detachment here stationed having been long commanded by one of the brothers Gerard, whose labours in these mountains, geographical and meteorological, are so well known. It has, however, long been abandoned as a military station, the peaceable state of the hill population rendering it unnecessary to keep a garrison in these mountains.

CULTIVATION.
August, 1847.

Captain Gerard's house, in which we spent the night, is elevated several hundred feet above the upper part of the village of Kotgarh, which occupies the steep face of the ridge directly overlooking the valley of the Sutlej. One reach of the river is visible from the front of the house, and the deep roar of the rapid stream was distinctly audible, notwithstanding that we were still 4000 feet above it. On the morning of the 7th of August we resumed our journey, descending abruptly through the village of Kotgarh to the Sutlej. At first the pine-forest which surrounded our night quarters, accompanied us down the steep hill-side. It was intermixed with a few scattered deodars; and the shrubby and herbaceous vegetation was in all its features identical with that of Simla. Soon, however, the descent was on a bare hill-side, and after reaching the village, the road, inclining to the right or east, kept nearly level for about a mile, passing through much cultivation, in terraced fields on the slopes. The crops were Kodon (Eleusine Coracana) and a cylindrical-headed Panicum, both grains commonly cultivated in the plains of India. There were also many fields of Amaranthus and Chenopodium. The first of these is occasionally cultivated in all parts of the hills, its bright red inflorescence, in autumn, tinging with flame the bare mountain slopes. The Chenopodium was new to me as a cultivated grain, and is particularly interesting from its analogy with the Quinoa of South America. It is entirely a rain crop, and grows very luxuriantly, rising to a height of six or eight feet, with a perfectly straight stout very succulent green stem, and large deltoid leaves, either pale green or of a reddish tinge, and covered with grey mealiness. The seeds, which are extremely small, are produced in great abundance on all the upper part of the plant, and are ripe in September.

DESCENT TO THE SUTLEJ.
August, 1847.

For about a mile after leaving the village of Kotgarh, the descent was trifling, but the remainder of the road to the Sutlej was very steep, so that the change in the vegetation was sudden, commencing just at the point where Quercus incana disappeared; before which few plants indicating heat occurred. The want of wood, no doubt, assisted the rapidity of the change, for the heat soon became considerable. In the course of the descent, I noted all the new forms as they occurred; but the exact order in which each individual species makes its appearance, depends so much upon accidental and unimportant circumstances, and is so likely to be affected by errors of observation, unless many series are obtained in different aspects of the same slope, that it would lead to no advantage to enumerate the species as they were met with. Nearly 1000 feet above the bed of the river, or at an elevation of about 4000 feet, the vegetation had become quite subtropical, species of Mollugo, Polanisia, Corchorus, Leucas, Euphorbia, Microrhynchus, and the ordinary grasses and Cyperaceæ of the plains, being the common weeds. The descent continued very abrupt, the heat increasing rapidly, till the road reached the bank of the Sutlej, at the village of Kepu, which occupies a flat piece of land overhanging the river.

VALLEY OF THE SUTLEJ.
August, 1847.