Horace Harmon Lurton,
Houghton v. Burden — Opinion of the Court
“ He was supported in his denial by Koehler, the broker who negotiated the loan for Canfield. All of this evidence was excepted to as contradicting the written agreement and was admitted over objection. Where the inquiry is whether the contract is one forbidden by law, it is open to evidence dehors the agreement to show that, though legal upon its face, it was in fact an illegal agreement. Otherwise the very purpose of the law in forbidding the taking of usury under any cover or pretext would be defeated. The defense is one which the debtor may make even though it contradicts the agreement. ”
