It will be conceded, that in countries where no law or regulation prevails, opposed to the existence and consequences of slavery, persons who are born in that condition in a foreign State would not be liberated by the accident of their introgression. The relation of domestic slavery is recognised in the law of nations, and the interference of the authorities of one State with the rights of a master belonging to another, without a valid cause, is a violation of that law. (Wheat. Law of Na., 724; 5 Stats. at Large, 601; Calh. Sp., 378; Reports of the Com. U.S. and G.B., 187, 238, 241.) The public law of Europe formerly permitted a master to reclaim his bondsman, within a limited period, wherever he could find him, and one of the capitularies of Charlemagne abolishes the rule of prescription. He directs, "that wheresoever, within the bounds of Italy, either the runaway slave of the king, or of the church, or of any other man, shall be found by his master, he shall be restored without any bar or prescription of years; yet upon the provision that the master be a Frank or German, or of any other nation (foreign;) but if he be a Lombard or a Roman, he shall acquire or receive his slaves by that law which has been established from ancient times among them." Without referring for precedents abroad, or to the colonial history, for similar instances, the history of the Confederation and Union affords evidence to attest the existence of this ancient law. In 1783, Congress directed General Washington to continue his remonstrances to the commander of the British forces respecting the permitting negroes belonging to the citizens of these States to leave New York, and to insist upon the discontinuance of that measure. In 1788, the resident minister of the United States at Madrid was instructed to obtain from the Spanish Crown orders to its Governors in Louisiana and Florida, "to permit and facilitate the apprehension of fugitive slaves from the States, promising that the States would observe the like conduct respecting fugitives from Spanish subjects." The committee that made the report of this resolution consisted of Hamilton, Madison, and Sedgwick, (2 Hamilton's Works, 473;) and the clause in the Federal Constitution providing for the restoration of fugitive slaves is a recognition of this ancient right, and of the principle that a change of place does not effect a change of condition. The diminution of the power of a master to reclaim his escaping bondsman in Europe commenced in the enactment of laws of prescription in favor of privileged communes. Bremen, Spire, Worms, Vienna, and Ratisbon, in Germany; Carcassonne, Beziers, Toulouse, and Paris, in France, acquired privileges on this subject at an early period. The ordinance of William the Conqueror, that a residence of any of the servile population of England, for a year and a day, without being claimed, in any city, burgh, walled town, or castle of the King, should entitle