William Strong, Packet Company v. Clough — Opinion of the Court
“ It is true, ordinarily, the general issue in an action of trespass on the case imposes upon the plaintiff the necessity of proving all the material facts averred in the declaration, but the ability of the plaintiffs to sue is not a fact directly averred, and, therefore, it cannot be disproved under a plea of not guilty. In fact it is not put in issue by such a plea. The defence that the plaintiffs suing as husband and wife are not married goes to the form of the writ, rather than to the cause of action, and it should, therefore, be pleaded in abatement, and not in bar. ”
