¶1delivered the opinion of the court.
¶2The appellant was indicted for an assault and battery committed upon the person of his wife. On the trial of the cause the wife was introduced by the State as a'witness to prove the •commission of the offence ; she objected to delivering her testimony, and thereupon the defendant protested against her being compelled to testify, and excepted-to the action of the court in'directing her so to do. It is conceded by counsel for the appellant that the wife was a competent witness ; but it is urged that she is such only for her own protection against the husband : that she may waive the protection thus afforded her, and thereupon the State is precluded from the benefit of her testimony.
¶3A careful examination has failed to discover any case in which the point now presented has been discussed or decided. We are, therefore, left to determine it upon the general principles governing the production and competency of testimony.
¶4If the proposition be, that the wife has only a privilege of testifying or not, as she may elect, it is clear that the appellant cannot assign for error the action of the court in compelling her to give evidence over her objection, for if the action of the court be error, it is the privilege-of the witness, and not the legal right or immunity of the defendant, which is impaired. Greenl. on Ev., sect. 451; 2 Ph. on Ev., 941; Roscoe’s Cr. Ev. 146 ; R. v. Kinglake, 11 Cox C. C. 499.
¶5Stating the question most strongly for the appellant, it is *354this : Is the wife a competent witness against the husband in a prosecution against him for an injury to her person, when she objects to giving evidence?
¶6The reasons why husband and wife were incompetent for or against each other at common law were : First, the unity of person and interest subsisting between them ; and, secondly, the regard which the law had for the harmony of the marital relation, to preserve which neither spouse was permitted to testify against the other.
¶7But at common law a wife was competent to testify against her husband in a prosecution for assault and battery on her. In such cases, the husband, having violated the sanctity and peace of the household, it was deemed more consonant with the interest of the public that the wife should gain protection through his punishment, than that she should be subjected to the danger of neglect and injury inflicted in the privacy of domestic life, by the husband, who had the power to exclude from its precincts all competent witnesses of bis offences.
¶8The exception was permitted for the protection of the wife ; but it was a protection afforded to her not purely as an individual, but as one of the public. Punishment is not inflicted by the law upon a wrong-doer to deter him or others from again wronging the particular individual injured, but to deter him and others from again injuring any person whatever. The husband, therefore, who assaults his wife, commits an injury, not only upon her, but upon society, of which they are members. It is for the injury to the public, committed upon it through the person of the wife, that he is punished. It is for the protection of society, and of the wife as a member of society, that she is made competent as a witness against the husband, for injuries committed by him on her. It is the offence against the public for which he is tried. He is offender of the public, and not the wife alone, and she is competent to testify as a witness for the public, and not as a witness for herself.
¶9And it is a competency not to be waived by her, or affected by her desires or fears.
¶10The judgment is affirmed.