In Bank of Metropolis v. New England Bank, 42 U.S. 1 How. 234 (1843), 11 L. Ed. 115, 6 How. 212, 12 L. Ed. 409, the Supreme Court held that, unless the creditor bank had extended credit on the faith of an account current between it and another bank, and thus acquired equities not arising from the mere relationship of debtor and creditor, it could not apply the proceeds of notes received by it for collection and apparently belonging to the debtor bank to a debt presently due and defeat the claims of the equitable owners.