REVIVOR. the name of a bill in chancery used to renew an original bill which for some reason has become inoperative. Vide Bill of Revivor.

REVOCATION¹. The act by which a person having authority, calls back or annuls² a power, gift, or benefit, which had been bestowed³ upon another. For example, a testator may revoke⁴ his testament⁵; a constituent⁶ may revoke his letter of attorney; a grantor may revoke a grant made by him, when he has reserved the power in the deed.

2. Revocations are expressed or implied. An express revocation of a will must be as formal as the will itself. 2 Dall. 289; 2 Yeates, R. 170. But this is not the rule in all the states. See 2 Conn. Rep. 67; 2 Nott & McCord, Rep. 485; 14 Mass. 208; 1 Harr. & McHenry, R. 409; Cam. & Norw. Rep. 174 2 Marsh⁷. Rep. 17.

3. Implied revocations take place, by marriage and birth of a child, by the English law. 4 Johns. Ch. R. 506, and the cases there cited by Chancellor⁸ Kent. 1 Wash. Rep. 140; 3 Call, Rep. 341; Cooper's Just. 497, and the cases there cited. In Pennsylvania, marriage or birth of a child, is a revocation as to them. 3 Binn. 498. A woman's will is revoked⁹ by her subsequent marriage, if she dies "before her hushand. Cruise, Dig. tit. 38, c. 6, s. 51. 4. An alienation¹⁰ of the estate by the devisor has the same effect of revoking¹¹ a will. 1 Roll. Ab. 615. See generally, as to revoking wills, Lovelass on Wills, oh. 3, p. 177 Fonbl. Eq. c. 2, s. 1; Robertson Wills, ch . 2, part 1.

5. Revocation of wills may be effected, 1. By cancellation¹² or obliteration¹³. 2. By a subsequent testamentary disposition¹⁴. 3. By an express revocation contained in a will or codicil¹⁵, or in any other distinct writing. 4. By the republication of a prior wili; by presumptive or implied revocation. Williams on Wills, 67; 3 Lom. on Ex'rs, 59. Vide Domat, Loix Civ. liv. 3, t. 1, s. 5.

6. The powers and authority of an attorney or agent may be revoked or deter-mined by the acts of the principal; by the acts of the attorney or agent; and by operation of law.

7. - 1. By the acts of the principal, which may be express or implied. An express revocation is made by a direct and formal and public declaration, or by an informal writing, or by parol. An implied revocation takes place when such circumstances occur as manifest the intention of the principal to revoke the authority; such, for example, as the appointment of another agent or attorney to perform acts which are incompatible¹⁶ with the exercise of the power formerly¹⁷ given to another; but this presumption¹⁸ arises only when there is such incompatibility¹⁹, for if the original agent has a general authority, and the second only a special power, the revocation will only operate pro²⁰ tanto. The performance by the principal himself of the act which he has authorized²¹ to be done by his attorney, is another example; as, if the authority be to collect a debt, and afterwards the principal receive it himself.

8. - 2. The renunciation of the agency by the attorney will have the same effect to determine the authority.

9. - 3. A revocation of an authority takes place by operation of law. This may be done in various ways: 1st. When the agency terminates by lapse²² of time; as, when it is created to endure for a year, it expires at the end of that period; or when a letter of attorney is given to transact²³ the constituent's business during his absence, the power ceases on his return. Poth. du Mandat, n. 119; Poth. Ob. n. 500.

10. - 2d. When a change of condition of the principal takes place so that he is rendered incapable²⁴ of performing the act himself, the power he has delegat-ed to another to do it must cease. Liverm. Ag. 306; 8 Wheat. R, 174. If an unmarried woman give a power of attorney and afterwards marry, the marriage does, ipso facto, operate as a revocation of the authority; 2 Kent, Com. 645, 3d edit. Story Bailm. §206; Story, Ag. §481; 5 East, R. 206; or if the principal become insane, at least after the establishment of the insanity²⁵ by an inquisition. 8 Wheat. R. 174, 201 to 204. When the principal becomes a bankrupt, his power of attorney in relation to property or rights of which he was dives-ted by the bankruptcy²⁶, is revoked by operation of law. 2 Kent, Com. 644, 3d edit.; 16 East, R. 382.

11. - 3d. The death of the principal will also have the effect of a revocation of the authority. Co. Litt. 52; Paley, Ag. by Lloyd, 185; 2 Liverm. Ag. 301; Story, Ag. §488; Story, Bailm. §203; Bac. Ab. Authority, E; 2 Kent, Com. 454, 3d edit.; 3 Chit. Com. Law, 223.

12. - 4th. When the condition of the agent or attorney has so changed as to render him incapable to perform his obligation towards the principal. When a married woman is prohibited by her hushand from the exercise of an authority given to her, it thereby²⁷ determines. When the agent becomes a bankrupt, his authority is so far revoked that he cannot receive any money on account of his principal; 5 B. & Ald. 645, 3d edit.; but for certain other purposes, the bankruptcy of the agent does not operate as a revocation. 3 Meriv. 322; Story, Ag. §486. The insanity of the agent would render him unfit to act in the business of the agency, and would determine his authority.

13. - 5th. The death of the agent puts an end to the agency. Litt. §66.

14. - 6th. The extinction²⁸ of the subject-matter of the agency, or of the principal's power over it, or the complete execution of the trust confided²⁹ to the agent, will put an end to and determine the agency.

15. It must be remembered that an authority, coupled with an interest, cannot be revoked either by the acts of the principal, or by operation of law. 2 Mason's R. 244, 342; 8 Wheat. R. 170; 1 Pet. R. 1; 2 Esp. R. 565; 10 B. & Cr. 731; Story Ag. §477, 483.

16. It is true in general, a power ceases with the life of the person making it; but if the interest or estate passes with the power, and vests in the person by whom the power is exercised, such person acts in his own name. The es-tate being in him, passes from him by a conveyance³⁰ in his own name. He is no longer a substitute acting³¹ in the name of another, but is the principal acting in his own name in pursuance of powers which limit the estate. The legal reason which limits the power to the life of the person giving it exists no long-er, and the rule ceases with the reason on which it is founded. 8 Wheat. R. 174.

17. The revocation of the agent is a revocation of any substitute he may have appointed. Poth. Mandat, n. 112; 2 Liverm. Ag. 307; Story, Ag. §469. But in some cases, as in the case of the master of a ship, his death does not revoke the power of the mate whom he had appointed; and in some cases of public appointments, on the death or removal of the principal officer, the depu-ties appointed by him are, by express provisions in the laws, autho rized to continue in the performance of their duties.

18. The time when the revocation takes effect must be considered, first, with regard to the agent, and secondly³², as it affects third persons. 1. When the revocation can be lawfully³³ made, it takes effect, as to the agent, from the moment it is communicated to him. 2. As to third persons, the revocation has no effect until it is made known to them; if, therefore, an agent, knowing of the revocation of his authority, deal with a third pers6n in the name of his late principal, when such person was ignorant of the revocation, both the agent and the principal will be bound by his acts. Story, Ag. §470; 2 Liverm. Ag. 306; 2 Kent, Com. 644, 3d edit.; Paley, Ag. by Lloyd, 108, 570; Story, Bailm. §208; 5 T. R. 215. A note or bill signed, accepted or indorsed by a clerk, after his discharge, who had been authorized to sign, indorse, or accept bills and notes for his principal while in his employ, will be binding³⁴ upon the latter, unless notice has been given of his discharge and the revocation of his authority. 3 Chit. Com. Law, 197.