Nathan Clifford, Smith v. United States (69 U.S. 219…
“ Indeed, nothing can be clearer, both upon principle and authority, than the doctrine that the liability of a surety is not to be extended by implication beyond the terms of his contract. To the extent, and in the manner, and under the circumstances pointed out in his obligation, he is bound, and no farther. He has a right to stand upon the very terms of his contract, and if he does not assent to any variation of it, and a variation is made, it is fatal. ”
