We cannot dwell longer on this subject, but the little that we have said will be enough to show the reader the importance to history, ethnography, and philology, of the study of Sanskrit. For further details we refer him to the special works of Orientalists and to the excellent historical manuals of Robiou, Lenormant, and Maspero. All the scientific results of whatever kind obtained up to 1820 are also skilfully and impartially summed up in Walter Hamilton's large work, "A Geographical, Statistical, and Historical Description of Hindustan, and the neighbouring Countries." This is a book which, by recording the various stages of scientific progress, marks with accuracy the point reached at any given epoch. After this brief review of the labours of scholars in reference to the intellectual and social life of the Hindus, we must turn to those studies whose aim was a knowledge of the physical character of the country. One of the most surprising results obtained by the travels of Webb and Moorcroft was the extraordinary height attributed by them to the Himalaya mountains. According to them their elevation exceeded that of the loftiest summits of the Andes. Colonel Colebrook had estimated the average height of the chain at 22,000 feet, and even this would appear to be less than the reality. Webb measured Yamunavatri, one of the most remarkable peaks of the chain, and estimated its height above the level of the plateau from which it rises as 20,000 feet, whilst the plateau in its turn is 5000 feet above the plain. Not satisfied, however, with what he looked upon as too perfunctory an estimate, he measured, with all possible mathematical accuracy, the Dewalagiri or White Mountain, and ascertained its height to be no less than 27,500 feet. The most remarkable feature of the Himalaya chain is the succession of these mountains, the ranges of heights rising one above the other. This gives a far more vivid impression of their loftiness than would one isolated peak rising from a plain and with its head lost among the clouds. The calculations of Webb and Colebrook, were soon verified by the mathematical observations of Colonel Crawford, who measured eight of the highest peaks of the Himalayas. According to him the loftiest of all was Chumulari, situated near the frontiers of Bhoutan and Thibet, which attains to a height of 30,000 feet above the sea-level.