Curtius Rufus on the Hindu Kush
Quintus Curtius Rufus (†53 CE): Roman senator, author of an important History of Alexander the Great.
In the Spring of 329, Alexander crossed the Hindu Kush from Gandara to Bactria in order to pursue the Persian leader Bessus. The best description is that of the Roman author Quintus Curtius Rufus, who based his account on earlier, Greek sources.
Section 7.4.20-25 of his History of Alexander the Great of Macedonia was translated by John Yardley.
Alexander in the Hindu Kush
[7.4.20] Bessus had an army of 8,000 Bactri