C is discharged from his surety-ship.

Discharge of surety when creditor compounds with, gives time to, or agrees not to sue, principal debtor Discharge of surety when creditor compounds with, gives time to, or agrees not to sue, principal debtor.-A contract between the creditor and the principal debtor, by which the creditor makes a composition with, or promises to give time to, or not to sue the principal debtor, discharges the surety, unless the surety assents to such contract.