The demurrer to the defendant’s answer raises this question: Whether an agreement not under seal, made by a creditor with the principal debtor upon a joint and several promissory note, payable on demand, that if the debtor would pay one half of the amount due within thirty days, the creditor would release and discharge him from the payment of the remainder, reserving his rights against any other party liable for *444the debt, will discharge the surety u.pon the note, the agreement being made upon the consideration of one dollar?

It is well settled that an agreement to extend the time for the payment of a debt, given to the principal without the assent of the surety, will discharge the surety. So will a release, or a covenant not to sue, or any agreement which changes the obligation of the principal under the contract. But it has been decided in this commonwealth that an agreement by the holder of a promissory note or bill of exchange to give time to, or not to sue, the maker or acceptor, reserving the right to hold the maker or indorser of the bill, or the indorser of the note, will not bar an action against the latter. Sohier v. Loring, 6 Cush. 537. Hutchins v. Nichols, 10 Cush. 299. In Sohier v. Loring it was said that the same rule has been applied in England, and in other states of the Union, to the case of principal and surety.

But without determining that the defence in the case at bar would fail on that ground, there is another and decisive answer to it. To discharge the surety, the agreement to give time, or to discharge the debt of the principal, must be a valid agreement, binding the creditor. If not a release under seal, the contract must have a sufficient consideration to support it. A contract to give up the remainder of a debt upon the payment of a part of what is due is without consideration in law. The contract set forth in the answer, therefore, being without legal consideration, was of no binding force or effect as between the parties to it. It could not have availed the defendant in an action against him upon the note, if the action had been brought immediately after the contract was made. The extension of it for ten days added nothing to its original obligation. It cannot therefore avail the surety.

Judgment for the plaintiff on the demurrer.