probable that this flood came from the Hunza valley. Smaller floods in the narrow Himalayan valleys are of frequent occurrence. For instance at Tashing, in 1850, a large lake was formed in the Rupal nullah by the snout of the Tashing glacier crossing the valley till it was jammed against the rock wall on the opposite side, thus blocking the Rupal torrent. Probably this will again happen, for when we were there in 1895 the Tashing glacier had once more blocked the valley to the depth of at least 200 feet, the Rupal stream finding its way underneath the ice; should this passage become in any way stopped, a huge lake must at once form behind the glacier. The extreme narrowness, and often the great depth, of many of these Himalayan valleys will always be favourable to the production of these floods. Should a landslip occur, or should a glacier, such as the Tashing glacier, block the valley, a flood must be the inevitable result. On the Indus there are many places where a dam might easily be formed. In the bend underneath Haramosh, at Lechre under Nanga Parbat, or further down below Chilas in that unknown country where the Indus begins to flow in a southerly direction. For there on the map the Indus is made to flow between two peaks, _not three miles apart_: one is marked 16,942 feet, and the other 15,250 feet, thus making the depth of this ravine over 12,000 feet. LIST OF SOME OF THE MOUNTAINS IN THE HIMALAYA THAT ARE OVER 24,000 FEET IN HEIGHT The following list of mountains that are more than 24,000 feet has been taken from various maps. It gives most of the peaks that have been trigonometrically measured, but probably there are at least as many more in those great mountain ranges, the Hindu Kush, the Mustagh, the Kuen Lun, and the Himalaya, that are over 24,000 feet high. The next highest peak in the world outside Asia is Aconcagua, 23,393 feet high.