Martens, [Georg Friedrich von]. An Essay on Privateers, Captures, and Particularly on Recaptures, According to the Laws, Treaties, and Usages of the Maritime Powers of Europe. To Which is Subjoined, A Discourse, In Which the Rights and Duties of Neutral Powers are Briefly Stated. Translated From the French, With Notes by Thomas Hartwell Horne. London: Printed for E. and R. Brooke, and J. Rider, 1801. xx, 240,  pp. Reprinted 2004 by The Lawbook Exchange, Ltd. ISBN 1-58477-401-0. Cloth. $95. * Reprint of the first English edition. The Discourse is an extract from the author's Summary of the Modern Law of the Nations of Europe (1789). Martens [1756-1821] was a German diplomat and jurist who published several important treatises on international law. Like Bynkershoeck and Moser, Martens rejected the idea that international law derived from God or nature. Instead, it is an acquired behavior practiced by civilized states. This perspective informs his Essay on Privateers, which was one of the first books on the subject. A model of rational organization, it reduces its subject to a system grounded in a set of clear principles.