30 ACCOUNT OF INDIA BY STRABO four persons seized a mule by its hinder leg, overpow- ered it, and dragged it to him. The monkeys are larger than the largest dogs; they are of a white colour, except the face, which is black. The contrary is observed in other places. Their tails are more than two cubits in length. They are very tame and are not of a mis- chievous disposition. They neither attack people nor do they steal. Stones are found there of the colour of frankincense, and sweeter than figs or honey. In some places there are serpents of two cubits in length, with membranous wings like bats. They fly at night and let fall drops of urine or sweat, which causes the skin of persons who are not on their guard to putrefy. There are also winged scorpions of great size. Ebony likewise grows there. There are also dogs of great courage, which do not let go their hold till water is poured into their nostrils; some of them have their sight distorted, and the eyes of others even fall out because of the tenaciousness of their bite. Both a lion and a bull were held fast by one of these dogs. The bull was caught by the muzzle, and died before the dog could be loosened. In the mountainous country is a river, the Silas, on the surface of which nothing will float. Demokritos, who had travelled over a large part of Asia, disbelieves this, and Aristotle does not credit it, although atmos- pheres exist so rare that no bird can sustain its flight in them. Some ascending vapours also attract and absorb, as it were, whatever is flying over them, as
