[d] 2 Carte. 401. Mod. Un. Hist. xxiii. 420.
[e] Mirror. c. 3. §. 35. Fleta. 3. 16. Britton. c. 29. 7 Rep. Calvin's case. 6.
[f] 1 Hal. P.C. 63.
[g] Stat. 13 W. III. c. 6.
[h] Stat. 1 Geo. I. c. 13.
[] 2 Inst. 121. 1 Hal. P.C. 64.
But, besides these express engagements, the law also holds that there is an implied, original, and virtual allegiance, owing from every subject to his sovereign, antecedently to any express promise; and although the subject never swore any faith or allegiance in form. For as the king, by the very descent of the crown, is fully invested with all the rights and bound to all the duties of sovereignty, before his coronation; so the subject is bound to his prince by an intrinsic allegiance, before the superinduction of those outward bonds of oath, homage, and fealty; which were only instituted to remind the subject of this his previous duty, and for the better securing it's performance[k]. The formal profession therefore, or oath of subjection, is nothing more than a declaration in words of what was before implied in law. Which occasions sir Edward Coke very justly to observe[l], that "all subjects are equally bounden to their allegiance, as if they had taken the oath; because it is written by the finger of the law in their hearts, and the taking of the corporal oath is but an outward declaration of the same." The sanction of an oath, it is true, in case of violation of duty, makes the guilt still more accumulated, by superadding perjury to treason; but it does not encrease the civil obligation to loyalty; it only strengthens the social tie by uniting it with that of religion.
[k] 1 Hal. P.C. 61.
[l] 2 Inst. 121.
Allegiance, both express and implied, is however distinguished by the law into two sorts or species, the one natural, the other local; the former being also perpetual, the latter temporary. Natural allegiance is such as is due from all men born within the king's dominions immediately upon their birth[m]. For, immediately upon their birth, they are under the king's protection; at a time too, when (during their infancy) they are incapable of protecting themselves. Natural allegiance is therefore a debt of gratitude; which cannot be forfeited, cancelled, or altered, by any change of time, place, or circumstance, nor by any thing but the united concurrence of the legislature[n]. An Englishman who removes to France, or to China, owes the same allegiance to the king of England there as at home, and twenty years hence as well as now. For it is a principle of universal law[o], that the natural-born subject of one prince cannot by any act of his own, no, not by swearing allegiance to another, put off or discharge his natural allegiance to the former: for this natural allegiance was intrinsic, and primitive, and antecedent to the other; and cannot be devested without the concurrent act of that prince to whom it was first due. Indeed the natural-born subject of one prince, to whom he owes allegiance, may be entangled by subjecting himself absolutely to another; but it is his own act that brings him into these straits and difficulties, of owing service to two masters; and it is unreasonable that, by such voluntary act of his own, he should be able at pleasure to unloose those bands, by which he is connected to his natural prince.