When Bessos, therefore, was deported across the Oxus to Zariaspa it is probable that he was sent to Andarab; and here too Alexander returned to winter towards the close of the year 329 B.C. after his extraordinary success in Sogdia (Bokhara). With his trans-Oxus campaign we have nothing to do; it is another history, and deeply interesting as it would be to follow it in detail we must return to Afghanistan. Nothing in all his Eastern campaign is more remarkable than the facility with which Alexander recruited his army from Greece during its progress. Gaps in the ranks were constantly filled up, and the fighting strength of his force maintained at a high level. His army was reorganized during the winter, and with the returning spring he again started expeditions across the Oxus, in the course of which he captured Roxana, the most beautiful woman in Asia (after the wife of Darius) and married her. The particular fortress which held this charming lady was perched on the top of an isolated craggy hill, and the story of its capture is as thrilling as that of Aornos subsequently. But, like Aornos, it is difficult to locate it. It might have been Dev Kala, or Kilif, or any of a dozen such rock-crowned hills which border the Oxus River. It is about this period that we read first of his encounters with the Skythic races of Central Asia, who gave him great trouble at the time and who subsequently subverted the Greek power in Baktria altogether. In the spring of 327 B.C. he moved out to invade a mountain district to the "East of Baktria" (probably modern Badakshan), and subdued the hill-tribes under Khorienes whom he confirmed in the government of his own country. It was summer ere he set out finally from Baktria on his Indian expedition. He recrossed the Paropamisos in ten days and halted at Alexandreia near Charikar. Then commences the first recorded expedition of the Kabul River basin. CHAPTER IV GREEK EXPLORATION--ALEXANDER--THE KABUL VALLEY TO THE INDUS