As the principal sources of Arrian, Ptolemy and Aristobulus occupy a privileged position in the historiographical tradition on Alexander, although their histories survive only in fragments. Both wrote eyewitness accounts of Alexander’s expedition, and offer valuable insight as to how Alexander spun some of the more controversial aspects to his contemporaries. Ptolemy was a high-ranking officer, and so his history focused on the military events, in which he exaggerated his own contributions in order to portray himself as a worthy successor to Alexander. He also emphasized his close association with Alexander (reconfigured as a Ptolemaic predecessor) in order to legitimate the foundation of his future dynasty in Egypt. Aristobulus’ role on the expedition, on the other hand, appears not to have been a military one. His generally eulogistic treatment of Alexander focuses upon his clemency, although occasionally overt criticisms of his ruthless imperialism and increasing megalomania can be discerned. Because Aristobulus is largely unknown apart from the authorship of his history, it is difficult to ascertain in whose interest he manipulated the figure of Alexander, whose memory had become hotly contested in the turbulent years after his premature death.