Ptolemy barely mentions Nysa, but we learn something about the Nysæans from fragments of the _Indika_ of Megasthenes, which have been collected by Dr. Schwanbeck and translated by M'Crindle. We learn that this pre-Alexandrian Greek Dionysos was a most beneficent conqueror. He taught the Indians how to make wine and cultivate the fields; he introduced the system of retiring to the slopes of Meros (the first "hill station" in India) in the hot weather, where "the army recruited by the cold breezes and the water which flowed fresh from the fountains, recovered from sickness.... Having achieved altogether many great and noble works, he was regarded as a deity, and obtained immortal honours."
Again we read, in a fragment quoted by Strabo, that the reason of calling the mountain above Nysa by the name of Meron was that "ivy grows there, and also the vine, although its fruit does not come to perfection, as the clusters, on account of the heaviness of the rains, fall off the trees before ripening. They" (the Greeks) "further call the Oxydrakai descendants of Dionysos, because the vine grew in their country, and their processions were conducted with great pomp, and their kings, on going forth to war, and on other occasions, marched in Bacchic fashion with drums beating," etc.
Again we find, in a fragment quoted by Polyænus, that Dionysos, "in his expedition against the Indians, in order that the cities might receive him willingly, disguised the arms with which he had equipped his troops, and made them wear soft raiment and fawn-skins. The spears were wrapped round with ivy, and the thyrsus had a sharp point. He gave the signal for battle by cymbals and drums instead of the trumpet; and, by regaling the enemy with wine, diverted their thoughts from war to dancing. These and all other Bacchic orgies were employed in the system of warfare by which he subjugated the Indians and the rest of Asia."
All these lively legends point to a very early subjugation of India by a Western race (who may have been of Greek origin) before the invasions of Assyrian, Mede, or Persian. It could not well have been later than the sixth century B.C., and might have been earlier by many centuries. The Nysæans, whose city Alexander spared, were the descendants of those conquerors who, coming from the West, were probably deterred by the heat of the plains of India from carrying their conquests south of the Punjab. They settled on the cool and well-watered slopes of those mountains which crown the uplands of Swat and Bajaur, where they cultivated the vine for generations, and after the course of centuries, through which they preserved the tradition of their Western origin, they welcomed the Macedonian conqueror as a man of their own faith and nation. It seems possible that they may have extended their habitat as far eastward as the upper Swat valley and the mountain region of the Indus, and at one time may have occupied the site of the ancient capital of the Assakenoi, Massaga, which there is reason to suppose stood near the position now occupied by the town of Matakanai; but they were clearly no longer there in the days of Alexander, and must be distinguished as a separate race altogether from the Assakenoi. As the centuries rolled on, this district of Swat, together with the valley of Dir, became a great headquarters of Buddhism. It is from this part of the trans-frontier that some of the most remarkable of those sculptures have been taken which exhibit so strong a Greek and Roman influence in their design. They are the undoubted relics of stupas, dagobas, and monasteries belonging to a period of a Buddhist occupation of the country, which was established after Alexander's time. Buddhism did not become a State religion till the reign of Asoka, grandson of that Sandrakottos (Chandragupta) to whom Megasthenes was sent as ambassador; and it is improbable that any of these buildings existed in the time of the Greek invasion, or we should certainly have heard of them.