Taylor & Wadsworth, merchants, etc., being indebted in various sums to different persons, assigned to the defendants certain ac*129counts, to be collected by them and the amount applied in payment of that indebtedness. The plaintiffs and defendants were among the persons for whose benefit the assignment was made; but it was agreed that the plaintiffs and one Hayden should be preferred in the order of payment, and the defendants admit that a sufficient amount has been received to pay their claims. On its face, the assignment is absolute and unconditional, and its object was shown aliunde, by the testimony of Taylor.

The first point made is, that Taylor was incompetent, on account of his interest in the event of the action. We are of opinion that this point is not well taken, and that Taylor had no such interest as would operate a disqualification either at common law or under the statute. The test in such cases is, that the witness will gain or lose by the direct legal operation and effect of the judgment, or that the record of the judgment will be legal evidence for or against him in some other action; and applying this test, it is plain that no disqualifying interest existed. The position of the defendants is, that the judgment against them reheves Taylor from his liability to the plaintiffs; but it is clear that no such result follows as a legal consequence from the mere judgment. To release him, it is necessary that the judgment should be satisfied, and until that is done, his liability will continue, though the effect of the judgment may be to diminish the probabilities of an action against him to enforce it. It is well settled that a speculative interest of this character cannot be urged as a ground of disqualification. (1 Greenleaf on Ev. sec. 400.)

Another answer is, that the interest of the witness was the same on both sides. He was indebted as well to the defendants as to the plaintiffs, and would be affected in the same manner by the success of the latter as by that of the former.

The second point is, that parol evidence was inadmissible to show the object of the assignment. The rule invoked is that which precludes the introduction of verbal testimony to contradict or vary the terms of a written instrument. If this rule were applicable, it would be decisive of the case; but the principle upon which the evidence was admitted rests upon an exception as well established as the rule itself. The inquiry related to the consideration upon *130which the assignment was made, and it was midoubtedly competent for the plaintiffs, notwithstanding the recitals upon the subject, to show what the consideration really was. The character of the transaction was a matter of legal conclusion from the facts elicited; and the effect of holding that the evidence was inadmissible, would be to enable the defendants to retain the benefits of the transaction relieved of its burdens. The principle involved is the same as that which permits the introduction of similar evidence to prove that a deed, absolute on its face, was intended as a mortgage ; and the admissibility of such evidence is not an open question in this Court.

The third and only remaining point is, that the action cannot be maintained for want of privity. The case, according to the evidence, is that of a trust, and the money sued for was received by the defendants in the character of trustees. It was received to the use of the plaintiffs, and the law creates the privity necessary for its recovery.

Judgment affirmed.