John Westlake (1828-1913) was a distinguished English jurist, specialising in international law. After his death, all of his papers on international law, with the exception of book reviews, were collected and edited by German lawyer Lassa Oppenheim into this volume, which was first published in 1914. The topics covered include the ancient precedents for international law, the rule of war, and territorial sovereignty, ‘especially with relation to uncivilized regions’. This book will be of value to anyone with an interest in the history of international law.