Front Page Titles (by Subject) APPENDIX Two letters of Philip III, King of Spain - The Freedom of the Seas (Latin and English version, Magoffin trans.)
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APPENDIX Two letters of Philip III, King of Spain - Hugo Grotius, The Freedom of the Seas (Latin and English version, Magoffin trans.) 
*The Freedom of the Seas, or the Right Which Belongs to the Dutch to take part in the East Indian Trade, *Translated by Ralph Van Deman Magoffin, Introduction by James Brown Scott, Director of the Carnegie Endowment for International Peace (New York: Oxford University Press, 1916).
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Since the month of August, 1914, the expression “Freedom of the Seas” has been on the lips alike of belligerent and neutral, and it seems as advisable as it is timely to issue—for the first time in English—the famous Latin tractate of Grotius proclaiming, explaining, and in no small measure making the “freedom of the seas.” 1
The title of the little book, first published, anonymously, in November, 1608, explains the reason for its composition: “The Freedom of the Seas, or the Right which belongs to the Dutch to take part in the East Indian trade.” It was an open secret that it was written by the young Dutch scholar and lawyer, Hugo Grotius. It was a secret and remained a secret until 1868 that the Mare Liberum was none other than Chapter XII of the treatise De Jure Praedae, written by Grotius in the winter of 1604–5, which first came to light in 1864 and was given to the world four years later. 2
The publication of the treatise on the law of prize is important as showing that the author of the Mare Liberum was already an accomplished international lawyer, and it proves beyond peradventure that the masterpiece of 1625 on the “Law of War and Peace” was not a hurried production, but the culmination of study and reflection extending over twenty years and more. More important still is the fact that neither the law of prize nor the Mare Liberum was a philosophic exercise, for it appears that Grotius had been retained by the Dutch East India Company to justify the capture by one of its ships of a Portuguese galleon in the straits of Malacca in the year 1602; that the treatise on the law of prize, of which the Mare Liberum is a chapter, was in the nature of a brief; and that the first systematic treatise on the law of nations—The Law of War and Peace—was not merely a philosophical disquisition, but that it was the direct outgrowth of an actual case and of professional employment. 1
The Spaniards, as is well known, then claimed the Pacific Ocean and the Gulf of Mexico, and Portugal claimed, in like manner, the Atlantic south of Morocco and the Indian Ocean, and both nations, at this time under a common sovereign, claimed and sought to exercise the right of excluding all foreigners from navigating or entering these waters. The Dutch, then at war with Spain, although not technically at war with Portugal, established themselves in 1598 in the island of Mauritius. Shortly thereafter they made settlements in Java and in the Moluccas. In 1602 the Dutch East India Company was formed, and, as it attempted to trade with the East Indies, its vessels came into competition with those of the Portuguese engaged in the Eastern trade, which sought to exclude them from the Indian waters. One Heemskerck, a captain in the employ of the Company, took a large Portuguese galleon in the Straits of Malacca. To trade with the East Indies was one thing, to capture Portuguese vessels was quite another thing. Therefore, some members of the Company refused their parts of the prize; others sold their shares in the company, and still others thought of establishing a new company in France, under the protection of King Henry IV, which should trade in peace and abstain from all warlike action. The matter was therefore one of no little importance, and it appears that Grotius was consulted and wrote his treatise on the law of prize, which is in the nature of a brief and is, at any rate, a lawyer’s argument. 1
It will be observed that the Mare Liberum was written to refute the unjustified claims of Spain and Portugal to the high seas and to exclude foreigners therefrom. The claims of England, less extensive but not less unjustifiable, were not mentioned, and yet, if the arguments of Grotius were sound, the English claims to the high seas to the south and east of England, as well as to undefined regions to the north and west, would likewise fall to the ground. Therefore the distinguished English lawyer, scholar, and publicist, John Selden by name, bestirred himself in behalf of his country and wrote his Mare Clausum in 1617 or 1618, although it was not published until 1635, to refute the little tractate, Mare Liberum.1 In the dedication to King Charles I, Selden said: “There are among foreign writers, who rashly attribute your Majesty’s more southern and eastern sea to their princes. Nor are there a few, who following chiefly some of the ancient Caesarian lawyers, endeavor to affirm, or beyond reason too easily admit, that all seas are common to the universality of mankind.” The thesis of Selden was twofold: first, “that the sea, by the law of nature or nations, is not common to all men, but capable of private dominion or property as well as the land”; second, “that the King of Great Britain is lord of the sea flowing about, as an inseparable and perpetual appendant of the British Empire.”