through the Sialkot and Gujranwala districts, joins the Ravi when in flood in the north of the Lyallpur district. But its waters will now be diverted into the river higher up in order to safeguard the Upper Chenab canal. Lahore is on the left bank of the Ravi. It is a mile from the cold weather channel, but in high floods the waters have often come almost up to the Fort. At Lahore the North Western Railway and the Grand Trunk Road are carried over the Ravi by masonry bridges. There is a second railway bridge over the Sidhnai reach in Multan. Though the Ravi, like the Jhelam, has a course of 450 miles, it has a far smaller catchment area, and is really a somewhat insignificant stream. In the cold weather the canal takes such a heavy toll from it that below Madhopur the supply of water is mainly drawn from the Ujh, and in Montgomery one may cross the bed dryshod for months together. The valley of the Ravi is far narrower than those of the rivers described in the preceding paragraphs, and the floods are most uncertain, but when they occur are of very great value.
The Bias. — The Bias (Sanskrit, Vipasa; Greek, Hyphasis) rises near the Rotang pass at a height of about 13,000 feet. Its head-waters are divided from those of the Ravi by the Bara Bangahal range. It flows for about sixty miles through the beautiful Kulu valley to Larji (3000 feet). It has at first a rapid course, but before it reaches Sultanpur (4000 feet), the chief village in Kulu, some thirty miles from the source, it has become, at least in the cold weather, a comparatively peaceful stream fringed with alder thickets. Heavy floods, however, sometimes cover fields and orchards with sand and boulders. There is a bridge at Manali (6100 feet), a very lovely spot, another below Nagar, and a third at Larji. Near Larji the river turns to the west down a bold ravine and becomes for a time the boundary between
