[Sidenote: LAKE OF SIROHI SAR. _May, 1848._]
I left Jamu on the morning of the 23rd of May. After crossing the Tawi by a ferry immediately below the town, my road lay for three miles up the left bank of that river, along an open sandy plain, only very partially cultivated. I then turned to the right, and entered the low hills which skirted the plain on that side. The road generally followed the course of the ravines, which have been excavated out of the soft sandstone by the numerous tributaries which descend to join the Tawi. These streams are all of small size, with gravelly or sandy beds, and are separated by low ridges of some breadth, faced generally by perpendicular cliffs. An undulating country of this nature occupies the whole of the space which intervenes between the outer range of hills and that next to it, a distance, by the road along which I travelled, of about twelve miles. This second range is a branch given off by an axis, whose direction is nearly east and west. The road ascended to it by a very steep rocky path, after surmounting which I found myself on a considerable tract of nearly level ground, partly occupied by a pretty little lake, with grassy banks. On the banks of this lake, which is called Sirohi Sar, and is rather less than half a mile in length, I encamped on the 24th of May, in a grove of very fine mango-trees. The depth of the lake did not appear great, its margins being for a considerable distance very shallow, and producing an abundance of reeds and water-plants, among which the sacred _Nelumbium_, with its gay flowers, was conspicuous. The elevation of the lake, as deduced from the boiling-point of water, I found to be 2200 feet. It occupies a depression in the top of the ridge, being surmounted on both sides by low ranges of hills, rising only to the height of a few hundred feet. At the east end, a low flat plain, interrupted only by a few regular rocky knolls, seemed to indicate that the size of the lake had formerly been more considerable than at present.
[Sidenote: VEGETATION OF SANDSTONE HILLS. _May, 1848._]
The vegetation of the country between Jamu and Sirohi Sar was entirely of a tropical character. The rocky hills were in many places covered with thinly scattered pines, all of small size, and generally with much-contorted trunks, but apparently healthy and vigorous. In the cultivated grounds the plants were identical with those of the plains, but, as is usual in all hilly countries, the barren tracts produced a flora of a different character. _Nerium odorum_ was abundant on the banks of streams, and I met with _Cassia fistula_, _Punica_, species of _Rhus_ and _Casearia_, as well as the curious _Euphorbia pentagona_, and now and then the beautiful _Bauhinia Vahlii_. _Acacia modesta_ and a _Zizyphus_ were the most common trees. The lake produced a great variety of water-plants, but except an _Alisma_ and _Dysophylla_, both of which were new to me, the species seemed all natives of the plains.
