Five consecutive narratives of Alexander’s Indian campaigns, compiled several centuries after his death from the works of the writers enumerated, who were either witnesses of the events they described, or living at the time of their occurrence, have descended to our times, and are respectively contained in the following productions:— 1. The Anabasis of Alexander, by Arrian of Nikomêdeia. 2. The History of Alexander the Great, by Quintus Curtius Rufus. 3. The Life of Alexander, in Plutarch’s Parallel Lives. 4. The History of Diodôros the Sicilian. 5. The Book of Macedonian History, compiled from the Universal History of Trogus Pompeius, by Justinus Frontinus. ARRIAN Arrian, who is universally allowed to be by far the best of all Alexander’s historians, was at once a philosopher, a statesman, a military commander, an expert in the tactics of war, and an accomplished writer. He was born towards the end of the first century of our aera at Nikomêdeia (now Ismiknid or Ismid), the capital of Bithynia, situated near the head of a deep bay at the south-eastern end of the Propontis or Sea of Marmora. He became a disciple of the Stoic philosopher Epiktêtos (much in the same way as Xenophon attached himself to Sôkrates), and gave to the world an abstract of his master’s lectures, together with an _Encheiridion_ or manual of his philosophy—a work which was long and widely popular. Under the Emperor Hadrian he was appointed in A.D. 132 prefect of Kappadokia. He had not long filled this office when a large body of wild Alan horsemen made one of their formidable raids into his province. They had hitherto proved irresistible, but on this occasion they were completely foiled by the skilful strategy and tactics of Arrian, who expelled them from his borders before they had secured any plunder. In Rome he was preferred to various high offices, and under Antoninus Pius was raised to the consulship. In his later years he retired to his native city, where he occupied himself in composing treatises on a considerable variety of subjects, but chiefly on history and geography. He died at an advanced age in the reign of the Emperor Marcus Aurelius.