This book examines how the power of the Ptolemies depended upon control of waterways, the easiest form of communication in the ancient world.Throughout history empire has required communications over an extended area. In the case of the Ptolemies, who ruled Egypt for three hundred years, the wide-ranging power and cultural achievements of their realm depended on their practical and intellectual mastery of Alexandria's waterborne connections across the Mediterranean and up the Nile.Throughout history empire has required communications over an extended area. In the case of the Ptolemies, who ruled Egypt for three hundred years, the wide-ranging power and cultural achievements of their realm depended on their practical and intellectual mastery of Alexandria's waterborne connections across the Mediterranean and up the Nile.With its emphasis on the dynasty's concern for control of the sea both the Mediterranean and the Red Sea and the Nile, this book offers a new and original perspective on Ptolemaic power in a key period of Hellenistic history. Within the developing Aegean empire of the Ptolemies, the role of the navy is examined together with that of its admirals. Egypt's close relationship to Rhodes is subjected to scrutiny, as is the constant threat of piracy to the transport of goods on the Nile and by sea. Along with the trade in grain came the exchange of other products. Ptolemaic kings used their wealth for luxury ships and the dissemination of royal portraiture was accompanied by royal cult. Alexandria, the new capital of Egypt, attracted poets, scholars and even philosophers; geographical exploration by sea was a feature of the period and observations of the time enjoyed a long afterlife.Preface; In memoriam F. W. Walbank Christian Habicht; 1. Introduction Kostas Buraselis and Dorothy J. Thompson; 2. The Ptolemaic League of Islanders Andrew Meadows; 3. Callicrates of Samos and Patroclus of Macedon: champions of Ptolemaic thalassocracy Hans Hauben; 4. Rhodesl#(