Howell Edmunds Jackson,
Chandler v. Calumet Hecla Mining Company…
“ On the same principle, parol testimony to show that the land covered by a patent of the United States to a settler under the pre-emption laws was such swamp and overflowed land must be held to be inadmissible to defeat the patent. It is the duty of the land department, of which the secretary is the head, to determine whether land patented to a settler is of the class subject to settlement under the pre-emption laws, and his judgment as to this fact is not open to contestation in an action at law by a mere intruder without title. ”
