Stephen Johnson Field,
St.louis Smelting and Refining Company v…
“ A patent, in a court of law, is conclusive as to all matters properly determined by the Land Department, when its action is within the scope of its authority, that is, when it has jurisdiction under the law to convey the land. In that court the patent is unassailable for mere errors of judgment. Indeed, the doctrine as to the regularity and validity of its acts, where it has jurisdiction, goes so far that if in any circumstances under existing law a patent would be held valid, it will be presumed that such circumstances existed. ”
