An aqueduct or canal extends in a direct line from the palace towards the mountains, a distance of at least a mile. It is an exceedingly massive work, consisting of two walls raised perhaps fifteen feet above the level of the plain, and built of very large blocks of hewn stone. The intervening space is filled with earth. At present, a small conduit, a foot or so wide, brings all the water which is required for the use of the inhabitants of Iskardo; but a very large quantity might be conveyed along the aqueduct, and the work is so strong and substantial that very little repair would be requisite to restore it to its original condition.
The fortified post of the present rulers of the country is built on the margin of the platform of alluvium, on the right bank of the little stream which joins the Indus to the east of the rock of Iskardo, and is separated by a hollow from the palace and the principal part of the village. It is built of unburnt brick, and is extremely irregular in shape, with rounded bastions at the angles.
The houses of Iskardo are very much scattered over a large extent of surface, so that there is no appearance of a town; nor is the population in the immediate neighbourhood of the rock so extensive as that of some of the more remote villages in the valley, and especially of those on the banks of the Shigar river, which are very richly cultivated. Many of the Iskardo houses, however, are very good, being often of two stories, and built of unburnt bricks in a framework of wood. Latticed windows, covered with paper or small plates of mica, are also common. The roofs are all flat, and covered with mud beaten hard.
[Sidenote: LACUSTRINE CLAY. _November, 1847._]
The lacustrine clay formation occurs in great quantity throughout the valley of Iskardo, and is nowhere seen in greater perfection than in the immediate neighbourhood of the town, where the cliffs facing the Indus, and those along the little lateral streams which descend from the south, exhibit an abundance of sections of these beds. The height of the cliffs is very variable; but it is seldom less than thirty feet, and to the east of the town is as much as a hundred feet. The clay formation varies much in appearance, being most commonly a very fine unctuous cream-coloured clay, stratified quite horizontally, but occasionally gritty and mixed with numerous particles of mica. Now and then thin beds of sand and of small waterworn pebbles alternate with the finer clays. In many places near the rock of Iskardo, the beds are very irregular, undulating a good deal, and at times exhibiting very remarkable flexures, as if the isolated rocky mass (which must have once been under water) had formed eddies in the lake, and prevented that regularity of deposition which is elsewhere so universal.