This is an action on a written guaranty in which there is an interlineation that alters its legal effect and avoids the instrument, if it was made after execution by the defendant and without his consent. The question at the trial was, whether the burden of proof was on the plaintiff to show that the interlineation was made before the instrument was executed, or on the defendant to show that it was made after-wards. The jury were instructed, that the burden of proof was on the plaintiff, and the case comes before us on exceptions to that instruction.

This question was raised, and its importance recognized by the court, in Davis v. Jenney, 1 Met. 221, but was not then decided. The court then said : “ The proof or admission of the signature of a party to an instrument is primá facie evidence that the instrument written over it is the act of the *317party; and this primá facie evidence will stand as binding proof, unless the defendant can rebut it by showing, from the appearance of the instrument itself, or otherwise, that it has been altered.” And in Pullen v. Hutchinson, 12 Shepley, 254, the court of Maine say : “ A written instrument, not attested by a subscribing witness, is sufficiently proved to authorize its introduction, by competent proof that the signature of the person, whose name is undersigned, is genuine. The party producing it is not required to proceed further upon a mere suggestion of a false date, when there are no indications of falsity found upon the paper, and prove that it was actually made on the day of the date. After proof that the signature is genuine, the law presumes that the instrument, in all its parts, is genuine also, when there are no indications to be found upon it to rebut such a presumption'.” This is doubtless sound doctrine, but it does not reach the present case. Here is an alteration, manifest on the face of the instrument introduced by the plaintiff. ■ And the question arises on that fact.

This question is settled in England, by a uniform course of decisions in suits on promissory notes and bills of exchange. And the same rule of evidence is applicable to a guaranty not under seal. Hemming v. Trenery, 9 Adolph. & El. 926.

In Bishop v. Chambre, Mood. & Malk. 116, and 3 Car. & P. 55, in a suit on a promissory note that had been apparently altered, lord Tenterden instructed the jury, that “it certainly lay on the plaintiff to account for the suspicious form and obvious alteration of the note.” In Henman v. Dickinson, 5 Bing. 183, it was decided that where an alteration appears upon the face of a bill of exchange, the party producing it must show that the alteration was made with consent of parties, or before the bill was issued. In Knight v. Clements, 3 Nev. & P. 375, and 8 Adolph. & El. 215, and in Clifford v. Parker, 2 Man. & Grang. 909, it was decided that a party setting up a bill, which, upon the face of it, clearly appears to have been altered in a material part, is bound to give some evidence of the circumstances under which the alteration took place. And this is laid down, by recent English writers, as the established law of their country. Chit. Con. (5th Am.ed.) *318786; Chit, on Bills, (10th Amer. ed.) 189, 190, 624; Smith on Merc. Law, (Amer. ed.) 267; Addison on Contracts, L62. The nature and amount of evidence, necessary to warrant a jury in finding that the alteration was made under such circumstances as not to vitiate the instrument,'will depend upon the nature of the alteration, and the facts of each case. In some cases, very slight evidence will suffice. Cariss v. Tattersall, 2 Man. & Grang. 890; Whitfield v. Collingwood, 1 Car. & Kirw. 325. It was said at nisi prius, in Bishop v. Chambre (ubi sup.) and in Taylor v. Mosely, 6 Car. & P. 273, that a jury might judge, from inspection, whether the alteration was made before or after the completion of the instrument. But it was adjudged otherwise, by the full court of king’s bench, in Knight v. Clements, above cited.

There is some conflict of decisions, on the question before us, in the American courts. But we do not deem it necessary or useful to examine them in detail. Most of them are referred to in 1 Greenl. on Ev. (5th ed.) § 564 and notes. And the great preponderance is found on the side of the rale established in England. No case seems yet to have arisen in England, in which an exception has been made to the rule. But it has been decided in Connecticut and New Jersey, that if the alteration is against the interest of the party deriving title from the instrument, as if it be a note altered to a less sum, the law does not so far presume that it was improperly made, as to throw on him the burden of accounting for it. Bailey v. Taylor, 11 Conn. 531; Den v. Farlee, 1 Zab. 279. Mr. Greenleaf states, as the result of the English and American decisions, that “ if any ground of suspicion is apparent upon the face of the instrument, the law presumes nothing, but leaves the question of the time when it was done, as well as that of the person by whom, and the intent with which, the alteration was made, as matters of fact to be ultimately found by the jury, upon proofs to be adduced by the party offering the instrument in evidence.” He also states, as the reason of the rule, that “ every alteration on the face of a written instrument detracts from its credit, and renders it suspicious and this suspicion the party claiming under it is ordinarily held bound to remove.”

*319In Byles on Bills, (2d Amer. ed.) 248, 249, where the English rule is stated, it is said: “ This rule is most reasonable ; for if it lay on the defendant, on an acceptor, for example, sued by an indorsee, to show that the alteration was improperly made, it might be a great hardship. For he may have no means of proving that the bill went unaltered from his hands, or of showing the circumstances of a subsequent alteration. But the burden of explaining an alteration imposes no hardship on the plaintiff; for if the bill was altered while in his hands, he may and ought to account for it; if before, then he took it with a mark of suspicion on its face, which ought to have induced him either to refuse it or to require evidence of the circumstances under which the alteration was made.” Park, J., in Henman v. Dickinson, already cited, said that good sense pointed out the rule, inasmuch as the defendant could not know the circumstances of a subsequent alteration. And this view of the matter is taken by Parker, C. J., in Hills v. Barnes, 11 N. Hamp. 395, and by Gibson, C. J., in Simpson v. Stackhouse, 9 Barr, 186.

We are not prepared to decide that a material alteration, manifest on the face of the instrument, is, in all cases whatsoever, such a suspicious circumstance as throws the burden of proof on the party claiming under the instrument. The effect of such a rule of law would be, that if no evidence is given by a party claiming under such an instrument, the issue must always be found against him; this being the meaning of the “ burden of proof.” 1 Curteis, 640. But we are of opinion, upon the authorities, English and American, and upon principle, that the burden of proof, in explanation of the instrument in suit in this case, was on the plaintiff. It was admitted by his counsel, at the argument, that the words “ and Co.,” which were interlined in the guaranty, were in a different handwriting from that of the rest of the instrument, and also in different ink. In such a case, the burden of explanation ought to be on the plaintiff; for such an alteration certainly throws suspicion on. the instrument. The instructions which were given to the jury were therefore right, at.least so far as they were applicable, or could be applied by the jury, to this case.

*320This question, in the case of a simple contract, seems to have first arisen in England, in the year 1818, in Johnson v. The Duke of Marlborough, 2 Stark. R. 313, although cases of altered deeds had arisen long before. And it was said by the counsel for the plaintiff, that it is an established rule of evidence, in England, in the case of deeds, that an alteration in them is presumed to be made before they were executed. But we have not examined that question; for we do not consider it of any importance, in the present case. It may be remarked, however, that the suggested English rule as to deeds has more than once been disregarded by the courts of this country. The first case, so far as we know, in which this question of burden of proof, or presumption, as to alteration of instruments, arose in the United States, was in 1782, in Morris’s Lessee v. Vanderen, 1 Dall. 64, where an altered deed was given in evidence. McKean, C. J., said: “ An interlineation, if made after the execution of a deed, will avoid it; nor is it to be presumed to have been made before; the presumption is the contrary, unless otherwise proved.” And in Jackson v. Osborn, 2 Wend. 555, the supreme court of New York held, in case of a deed, that “ when nothing appears but the fact of an erasure or interlineation in a material part, of which no notice is taken at the time of execution, it is a suspicious circumstance, which requires some explanation on the part of the plaintiff; ” thus applying to a deed the rule applied in England, and generally in this country, to a simple contract. See also Jackson v. Jacoby, 9 Cow. 125; Waring v. Smyth, 2 Barbour Ch. Rep. 133; Herrick v. Malin, 22 Wend. 388 ; Prevost v. Gratz, Peters, C. C. 369; Davis v. Oliver, 1 Ridgew. P. C. 1, 15.

Judgment on the verdict.