The result of these discussions is, that in general, the status, or civil and political capacity of a person, is determined, in the first instance, by the law of the domicil where he is born; that the legal effect on persons, arising from the operation of the law of that domicil, is not indelible, but that a new capacity or status may be acquired by a change of domicil. That questions of status are closely connected with considerations arising out of the social and political organization of the State where they originate, and each sovereign power must determine them within its own territories.

A large class of cases has been decided upon the second of the propositions above stated, in the Southern and Western courts—cases in which the law of the actual domicil was adjudged to have altered the native condition and status of the slave, although he had never actually possessed the status of freedom in that domicil. (Rankin v. Lydia, 2 A.K.M.; Herny v. Decker, Walk., 36; 4 Mart., 385; 1 Misso., 472; Hunter v. Fulcher, 1 Leigh.)

I do not impugn the authority of these cases. No evidence is found in the record to establish the existence of a domicil acquired by the master and slave, either in Illinois or Minnesota. The master is described as an officer of the army, who was transferred from one station to another, along the Western frontier, in the line of his duty, and who, after performing the usual tours of service, returned to Missouri; these slaves returned to Missouri with him, and had been there for near fifteen years, in that condition, when this suit was instituted. But absence, in the performance of military duty, without more, is a fact of no importance in determining a question of a change of domicil. Questions of that kind depend upon acts and intentions, and are ascertained from motives, pursuits, the condition of the family, and fortune of the party, and no change will be inferred, unless evidence shows that one domicil was abandoned, and there was an intention to acquire another. (11 L. and Eq., 6; 6 Exch., 217; 6 M. and W., 511; 2 Curt. Ecc. R., 368.)

The cases first cited deny the authority of a foreign law to dissolve relations which have been legally contracted in the State where the parties are, and have their actual domicil—relations which were never questioned during their absence from that State—relations which are consistent with the native capacity and condition of the respective parties, and with the policy of the State where they reside; but which relations were inconsistent with the policy or laws of the State or Territory within which they had been for a time, and from which they had returned, with these relations undisturbed. It is upon the assumption, that the law of Illinois or Minnesota was indelibly impressed upon the slave, and its consequences carried into Missouri, that the claim of the plaintiff depends. The importance of the case entitles the doctrine on which it rests to a careful examination.

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, Béziers, 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 them to perpetual liberty, is a specimen of these laws.

The earliest publicist who has discussed this subject is Bodin, a jurist of the sixteenth century, whose work was quoted in the early discussions of the courts in France and England on this subject. He says: "In France, although there be some remembrance of old servitude, yet it is not lawful here to make a slave or to buy any one of others, insomuch as the slaves of strangers, so soon as they set their foot within France, become frank and free, as was determined by an old decree of the court of Paris against an ambassador of Spain, who had brought a slave with him into France." He states another case, which arose in the city of Toulouse, of a Genoese merchant, who had carried a slave into that city on his voyage from Spain; and when the matter was brought before the magistrates, the "procureur of the city, out of the records, showed certain ancient privileges given unto them of Tholouse, wherein it was granted that slaves, so soon as they should come into Tholouse, should be free." These cases were cited with much approbation in the discussion of the claims of the West India slaves of Verdelin for freedom, in 1738, before the judges in admiralty, (15 Causes Celébrés, p. 1; 2 Masse Droit Com., sec. 58,) and were reproduced before Lord Mansfield, in the cause of Somersett, in 1772. Of the cases cited by Bodin, it is to be observed that Charles V of France exempted all the inhabitants of Paris from serfdom, or other feudal incapacities, in 1371, and this was confirmed by several of his successors, (3 Dulaire Hist. de Par., 546; Broud. Cout. de Par., 21,) and the ordinance of Toulouse is preserved as follows: "Civitas Tholosana fuit et erit sine fine libera, adeo ut servi et ancillæ, sclavi et sclavæ, dominos sive dominas habentes, cum rebus vel sine rebus suis, ad Tholosam vel infrâ terminos extra urbem terminatos accedentes acquirant libertatem." (Hist. de Langue, tome 3, p. 69; Ibid. 6, p. 8; Loysel Inst., b. 1, sec. 6.)

The decisions were made upon special ordinances, or charters, which contained positive prohibitions of slavery, and where liberty had been granted as a privilege; and the history of Paris furnishes but little support for the boast that she was a "sacro sancta civitas," where liberty always had an asylum, or for the "self-complacent rhapsodies" of the French advocates in the case of Verdelin, which amused the grave lawyers who argued the case of Somersett. The case of Verdelin was decided upon a special ordinance, which prescribed the conditions on which West India slaves might be introduced into France, and which had been disregarded by the master.

The case of Somersett was that of a Virginia slave carried to England by his master in 1770, and who remained there two years. For some cause, he was confined on a vessel destined to Jamaica, where he was to be sold. Lord Mansfield, upon a return to a habeas corpus, states the question involved. "Here, the person of the slave himself," he says, "is the immediate subject of inquiry, Can any dominion, authority, or coercion, be exercised in this country, according to the American laws?" He answers: "The difficulty of adopting the relation, without adopting it in all its consequences, is indeed extreme, and yet many of those consequences are absolutely contrary to the municipal law of England." Again, he says: "The return states that the slave departed, and refused to serve; whereupon, he was kept to be sold abroad." "So high an act of dominion must be recognised by the law of the country where it is used. The power of the master over his slave has been extremely different in different countries." "The state of slavery is of such a nature, that it is incapable of being introduced on any reasons, moral or political, but only by positive law, which preserves its force long after the reasons, occasion, and time itself, from whence it was created, are erased from the memory. It is so odious, that nothing can be suffered to support it but positive law." That there is a difference in the systems of States, which recognise and which do not recognise the institution of slavery, cannot be disguised. Constitutional law, punitive law, police, domestic economy, industrial pursuits, and amusements, the modes of thinking and of belief of the population of the respective communities, all show the profound influence exerted upon society by this single arrangement. This influence was discovered in the Federal Convention, in the deliberations on the plan of the Constitution. Mr. Madison observed, "that the States were divided into different interests, not by their difference of size, but by other circumstances; the most material of which resulted partly from climate, but principally from the effects of their having or not having slaves. These two causes concur in forming the great division of interests in the United States."

The question to be raised with the opinion of Lord Mansfield, therefore, is not in respect to the incongruity of the two systems, but whether slavery was absolutely contrary to the law of England; for if it was so, clearly, the American laws could not operate there. Historical research ascertains that at the date of the Conquest the rural population of England were generally in a servile condition, and under various names, denoting slight variances in condition, they were sold with the land like cattle, and were a part of its living money. Traces of the existence of African slaves are to be found in the early chronicles. Parliament in the time of Richard II, and also of Henry VIII, refused to adopt a general law of emancipation. Acts of emancipation by the last-named monarch and by Elizabeth are preserved.