delivered the opinion of the court.
It is well settled in our equity law, and it seems, toо, in the legal systems of other countries, that the surety is entitled to the benefit оf all the securities for the debt takеn by the creditor from the principal debtor, and is therefore discharged from liability to the extent to which the creditor has parted with these securities ; and this is agreeable to natural equity. (1 Story’s Eq. § 327, et seq.) Accordingly, in a casе like the present, (Calvert v. The London Dock Company, 2 Keen’s Rep. 639,) whеre a contractor undertook to perform certain work, and it wаs agreed that three-fourths of the work, as furnished should be paid for every two months, and the remaining fourth upon the completion of the work, the Master of the Rolls, Lord Langdale, decidеd that the sureties for the due per
