This is the third of eight volumes on the history of Greece, first published in 1836. The volumes were aimed at two audiences: those people who wanted more than a superficial knowledge of the subject, but did not have the time or means to study the original sources, and those who had access to the ancient authors, but required a guide or interpreter. The third volume considers the period from the beginning of the Athenian maritime ascendancy to the Thirty Years' Truce between Athens and Sparta, and the age of Pericles. It looks at the causes and events of the Peloponnesian War from its beginnings to the Sicilian Expedition. This book will be of interest to researchers and students of ancient history.