Note 24 — Chapter XXII · —Alexander crosses the Indian Kaukasos to invade India and advances to the river Kôphên
Reading edition
The Companion Cavalry, called sometimes simply the Companions, were the Royal Horse Guards, a body which at the beginning of the campaign consisted of 1500 men, all scions of the noblest families of Macedonia and Thessaly. In the course of the war their numbers were augmented perhaps to 5000, as Mützell conjectures.