the Kabul valley after vanquishing the Kidarite principalities. Sardonyx seal representing Vishnu with a worshipper, Afghanistan or Pakistan, 4th-6th century CE. The inscription in cursive Bactrian reads: " Mihira ( Mihirakula ?), Vishnu and Shiva ". British Museum . The Alchon ruler Toramana established his rule over Gandhara and western Punjab,