Alexander the Great in the Quran called them the Caspian Gates. Twenty and two Kings did I shut up therein. These pseudepigraphic letters from Alexander to his mother Olympias and his tutor Aristotle, describing his marvellous adventures at the end of the World, date back to the original Greek recension α written in the 4th century in Alexandria. The letters are "the literary expression of a living popular tradition" that had been evolving for at least three centuries before the Quran was written. Several historical figures, both Muslim and Christian, searched for Alexander's Gate and several different identifications were made with actual walls. During the Middle
Indian campaign of Alexander the Great noting that Porus would never have said those words. Alexander did not continue, thus leaving all the headwaters of the Indus River unconquered. He later founded Alexandria Nikaia (Victory), located at the battle site, to commemorate his triumph. He also founded Alexandria Bucephalus on the opposite bank of the river in memory of his much-cherished horse, Bucephalus, who carried Alexander through the Indian subcontinent and died heroically during the Battle of Hydaspes. Musicanus (Indian: Mûshika) was an Indian king at the head of the Indus, who raised a rebellion against Alexander the Great around 323 BCE. Peithon, one of Alexander's