Smith Thompson,
Union Bank of Georgetown v. Geary…
“ It is unnecessary to examine whether this defence would have been available or not. The validity of the contract did not depend upon that question. It is enough that the bank considered it a doubtful question; and that they supposed they were gaining some benefit by foreclosing all inquiry on the subject; and the complainant, by precluding herself from setting up the defence, waved what she supposed might have been of material benefit to her. That the bank considered it of some importance to shut out this defence, is fully shown by the testimony of Magruder. ”
