Melville Fuller,
Hilton v. Guyot/Dissent Fuller…
“ Jones, 13 Mees. & W. 633: 'Where a court of competent jurisdiction had adjudicated a certain sum to be due from one person to another, a legal obligation arises to pay that sum, on which an action of debt to enforce the judgment may be maintained. It is in this way that the judgments of foreign and colonial courts are supported and enforced.' And taking this as the principle, it seems to follow that anything which negatives the existence of that legal obligation, or excuses the defendant from the performance of it, must form a good defense to the action. ”
