The opinion of the court was delivered by
Redfield, J.The question made in the defence of the present «ase was, whether the principal witness on the part of the state, upon whom the defendant is charged with making an assault, did himself make the first assault, and whether what the defendant did was done in self defence. Green testified, that he did not make any disturbance about the defendant’s dwelling, or assault upon his person. He was then asked if he did not, while on the way to the defendant’s house, on the night of the affray, declare to a particular person, that he wanted some powder to blow up the defendant’s house, — which he denied. The defendant then offered to show, that he did make *119such declaration; and the court rejected the evidence, upon the ground that the inquiry concerned a matter wholly collateral to the main issue.
It is not always easy to determine precisely what is collateral to the main issue. Something on that head must be left to the discretion of the judge presiding at the trial. In the present case, if it was material to know with what intent the witness went there, that could only be shown by his acts and his declarations in connection with those acts. For this purpose the efforts and inquiries, which the witness made, for help and implements, whether of offence, or defence, would be material.
As part of that intent it might have been shown, that he declared his intention to be only to see if the hay remained; and we apprehend, what is stated in the bill of exceptions, in regard to the tendency of the testimony on the part of the state, to show that he went there with that intent, must have been derived, partly, at least, from his declarations on the way and while there. That is the only way it could be shown, aside from his own testimony. And we think, that all his declarations from the time of his setting out on this expedition, in connection with his acts, are competent, to show with what intent he went there; — and if an innocent intent may be shown in this way, then the contrary may also be shown in the same manner, and this may be shown by Green, or any other witness ; and in this view the evidence was in no sense collateral.
If, then, Green denied making such a declaration, it might be shown, that he in fact did, both as tending to impeach the witness by contradicting him, and as going to establish the fact, that he went there for the purpose of beginning an affray, and as tending to justify, perhaps, more vigorous defence of any supposed offensive movements on the part of Green. For a part of the evidence rejected was, that he had repeatedly threatened the defendant; and it is not impossible, that if this evidence had been admitted by the court; the defendant might have satisfied the jury, that he had been informed of the fact .of Green’s approach, and of his declarations of his intent, ■ — although, from the case, this seems hardly probable.
But these declarations are material, as showing the intent with which Green went there, and also his feélings towards the defendant ; and it has been held, both in this state and in England, that this last *120point is a sufficient ground of impeaching a witness, and that the declarations of the witness to this effect may be shown, as substantive matter of proof, without first inquiring of him. Lord Stafford’s case, 7 Howell’s State Trials 1400,—where it was permitted to be shown, that the witness had attempted to suborn witnesses to testify falsely against the prisoner. So in Thomas v. David, C. & P. 350, where a female witness was offered, on the part of the plaintiff, to prove a promissory note, claimed to be forged, it was permitted to ask the witness if she was not the kept mistress of the plaintiff, for the purpose of showing, that she had a motive to favor the plaintiff, or was easily controlled by him, and might thus be induced to give false evidence. And, upon the witness denying it, she was contradicted by other witnesses, — the court holding the matter not collateral. So it is always competent to ask a witness, if he has not said, he would be revenged upon the party, against whom he is called, and this with reference to the very suit on trial, and, if the witness denies having made such declarations, to contradict him, by showing that he did make them. 2 Camp. 638. And in Pierce v. Gilson, 9 Vt. 216, it was permitted to show, that an ill state of feeling existed, on the part of the witness, as to the party against whom he was called, and this, without first ashing the witness.
Whether, then, we consider the declarations of Green as tending to show, that he went there for the purpose and with the intent of making a serious assault upon the defendant, as a part of the res gestai, and tending to characterize the whole transaction, both as to the defendant and the witness, and their several acts, and thus the better to enable the heirs to determine, whether the one, or the other, was the aggressor, and whether the defendant acted in good faith in the matter, — or as tending to show the state of mind, which the witness entertained towards the defendant, and the temptation, which he would have to put the most favorable construction upon his own acts and the most exaggerated one upon those of the defendant, the evidence was clearly admissible, — and probably without first inquiring of the witness, — and also as tending to impeach the witness, by contradicting his main evidence, — in which view he must first be inquired of. 1 Stark. Ev. 189, 199.
Upon the other point the case is too indefinitely stated, to determine, with much certainty, how far the evidence was admissible. *121If the decision was intended to exclude all evidence of previous threats, or affrays, on the part of the witness, as to the defendant, unless upon that very night, it might be clearly wrong, and would be, if the testimony had any tendency to show, that the defendant, at the time, had just cause of alarm and to fear serious injury to his person or property. A case might have been made out, coming within the offer, which would have justified the defendant, even if he had taken the life of the witness ; and the decision of the court, in the terms in which it is expressed, would have rejected it, unless occurring at that very time. But we are not to presume any such case was proposed to be made out by the defendant, or it would have been admitted by the court. We rather presume, that the offer was intended to show, that the defendant and witness had had frequent quarrels, — which was not farther important, than as it tended to show the temper and disposition of the witness Green; and not having been offered for any such purpose, it is impossible for us to say there was error in rejecting it.
Judgment that the verdict be set aside, and the respondent have a new trial. Cause remanded for that purpose.