delivered the opinion of the Court.
To the May Term, 1861, of the Circuit Court for Davidson County, Bees W. Porter sued the plaintiff in error in an action of assumpsit. As it becomes necessary to the consideration of the questions presented, we give the declaration in its words.
“ The • plaintiff sues the defendant for twenty-one hundred dollars, which, he says, is due from it on the - day of -, 185-, by account, for money before that time deposited with the defendant, and for money loaned, and for money due and owing upon previous dealings between them, which said sum of money, with interest thereon is now due.”
To this declaration were pleaded non-assumpsit, payment and set-off.
In the view we take of the case, it is unnecessary to notice the third plea, which is at least very *449informal, at all, farther than to say the matter of set-off is a promise in the words:
“ $2,060.00. Nashville, March 24, 1856.
“Pour months after date I promise to pay Rees "W. Porter or order two thousand and sixty dollars at the Bank of Tennessee, at Nashville, for value received. Signed, “ Rees W. Pobteb,
“Rees W. Poktek, “John S. Bbxen.
“Jas. S. Bbadley,
“ Wm. Summebhill.”
And which is claimed to have been sold by Rees "W. Porter to the Bank of Commerce. The averment in the declaration, “ and for money due and owing upon previous dealing between them,” saves the necessity of an inquiry into the form and substance of the plea of set-off.
To it the plea of non-assumpsit is sufficient to admit all defences, as it puts in issue the allegation that there is any thing due upon previous dealings. This, is especially so, as the action of assumpsit is of an equitable character in the nature of an account in Chancery.
Assumpsit would lie upon the paper exhibited, and the defendant in error instituting that action for the broad purpose of a judicial investigation of previous dealings between the parties, it is a natural and legitimate answer to show, under a general denial, that nothing is due the plaintiff, and to sustain that denial by a counter assumpsit, purely defensive and *450not as a cross-action. The plaintiff is in no condition to complain that he has been misled by this illogical and uncertain state of pleadings, as his declaration warrants it.
Under a replication of res judicata it is insisted that as a suit by "Wetmore, for the benefit of the bank, against Brien & Bradley, this paper was held to be void for usury, the bank is. estopped from seeking a recovery against Porter. This would be so if Porter was a surety upon the paper. He is not shown to be a surety, but is, so far as we can by the record see, a principal, and the rule does not apply. The distinction is elaborately and plainly defined by Nicholson, C. J., in Gill v. Morris, determined at Knoxville at the last term.
The judgment is reversed and the cause remanded, with leave to the parties to replead.