Source: William Blackstone. Commentaries on the Laws of England. Vol, 1 (1765), pages 442-445. Continued:
But though our law in general considers man and wife as one person, yet there are some instances in which she is separately considered; as inferior to him, and acting by his compulsion. And therefore any deeds executed, and acts done, by her, during her coverture, are void; except it be a fine, or the like manner of record, in which case she must be solely and secretly examined, to learn if her act be voluntary. She cannot by will devise lands to her husband, unless under special circumstances; for at the time of making it she is supposed to be under his coercion. And in some felonies, and other inferior crimes, committed by her through constraint of her husband, the law excuses her: but this extends not to treason or murder.
The husband also, by the old law, might give his wife moderate correction. For, as he is to answer for her misbehaviour, the law thought it reasonable to intrust him with this power of restraining her, by domestic chastisement, in the same moderation that a man is allowed to correct his apprentices or children; for whom the master or parent is also liable in some cases to answer. But this power of correction was confined within reasonable bounds, and the husband was prohibited from using any violence to his wife, aliter quam ad virum, ex causa regiminis et castigationis uxoris suae, licite et rationabiliter pertinet. The civil law gave the husband the same, or a larger, authority over his wife: allowing him, for some misdemeanors, flagellis et fustibus acriter verberare uxorem; for others, only modicam castigationem adhibere. But with us, in the politer reign of Charles the second, this power of correction began to be doubted; and a wife may now have security of the peace against her husband; or, in return, a husband against his wife. Yet the lower rank of people, who were always fond of the old common law, still claim and exert their ancient privilege: and the courts of law will still permit a husband to restrain a wife of her liberty, in the case of any gross misbehaviour.
These are the chief legal effects of marriage during the coverture; upon which we may observe, that even the disabilities which the wife lies under are for the most part intended for her protection and benefit: so great a favourite is the female sex of the laws of England.
Source: William Blackstone. Commentaries on the Laws of England. Vol, 1 (1765), pages 442-445.

