Originally published: London: William Du-Gard, 1652. [xlvi], 500, [10], 37 pp. Reprint of the first edition in English. Mare Clausum (Dominion of the Sea) is the most famous British reply to the argument of Grotius's Mare Liberum, which denied the validity of England's claim to the high seas south and east of England. John Selden [1584-1654] argued that England's jurisdiction extends, in fact, to all waters surrounding the isles. His use of common-law principles to rebut Grotius's philosophical argument is quite impressive. Holdsworth notes that his case was enriched by "a vast historical knowledge, replete with references to the customs of peoples from the times of the Greeks to his time.": Holdsworth, A History of English Law V: 10-11.