Mountains are constantly mentioned in the Rigveda, and rivers are described as flowing from them. The Himalaya ("abode of snow") range in general is evidently meant by the "snowy" (himavantah) mountains which are in the keeping of the Creator. But no individual peak is mentioned with the exception of Mujavat, which is indirectly referred to as the home of Soma. This peak, it is to be inferred from later Vedic literature, was situated close to the Kabul Valley, and was probably one of the mountains to the south-west of Kashmir. The Atharva-veda also mentions two other mountains of the Himalaya. One of these is called Trikakud, the "three-peaked" (in the later literature Trikuta, and even now Trikota), through the valley at the foot of which flows the Asikni (Chenab). The other is Navaprabhramçana ("sinking of the ship"), doubtless identical with the Naubandhana ("binding of the ship") of the epic and the Manoravasarpana of the Çatapatha Brahmana, on which the ship of Manu is said to have rested when the deluge subsided. The Rigveda knows nothing of the Vindhya range, which divides Northern India from the southern triangle of the peninsula called the Dekhan; [7] nor does it mention the Narmada River (now Nerbudda), which flows immediately south of and parallel to that range. From these data it may safely be concluded that the Aryans, when the hymns of the Rigveda were composed, had overspread that portion of the north-west which appears on the map as a fan-shaped territory, bounded on the west by the Indus, on the east by the Sutlej, and on the north by the Himalaya, with a fringe of settlements extending beyond those limits to the east and the west. Now the Panjab of the present day is a vast arid plain, from which, except in the north-west corner at Rawal Pindi, no mountains are visible, and over which no monsoon storms break. Here there are no grand displays of the strife of the elements, but only gentle showers fall during the rainy season, while the phenomena of dawn are far more gorgeous than elsewhere in the north. There is, therefore, some probability in the contention of Professor Hopkins, that only the older hymns, such as those to Varuna and Ushas, were composed in the Panjab itself, while the rest arose in the sacred region near the Sarasvati, south of the modern Ambala, where all the conditions required by the Rigveda are found. This is more likely than the assumption that the climate of the Panjab has radically changed since the age of the Vedic poets.