By the Court. The letter of Moore, which is set forth as the cause of action, is not an assumption, but a promise to become surety that the judgment against Spenser should be paid. He is not liable upon it as an actual entry of security; for such entry must be on the justice’s docket and signed by the surety. Dig. 338, 5, 13. The deft, is liable on this letter for a failure to become bound as surety; but such an action is not within the jurisdiction of a justice of the peace. Judgment reversed.