Bonds given for the fulfillment of private obligations, are purely the result of the contract that the individuals concerned, may make. If it is a bond, for instance, given to save harmless some certain employer from any act of dishonesty or default of his employe, this contract is controlled entirely by the parties to it; the bond may be for a large or small sum; its time of commencement and its duration both depend on the terms of the contract. It is a voluntary obligation and no rule of statute controls the entering into such a bond. Bonds given to secure voluntary contracts are to be distinguished from bonds given for the performance of the duties of a public office, such as a sheriff's bond, or the bond given by the holder of the office of the county treasurer. The strict fulfillment of the obligations named to be performed in a private bond may be waived; the parties to such a contract say whether or not they are satisfied to cancel such a bond; where there has been a breach of the same, the law can ordinarily offer no dictation. The general rules of law of suretyship and the usual rules of construction govern in the matter of bonds given for the performance of a private obligation.