Roger B. Taney,
United States v. Pillerin — Opinion of the Court
“ For all of the grants are absolute, or upon conditions subsequent; and if they had been originally made by competent authority, would have passed the legal title at the time, subject only to be divested by a breach of the condition, in the cases where a condition subsequent is annexed. Such a title, if afterwards recognized by the Spanish authorities, is protected by the treaty, and is independent of any legislation by Congress, and requires no proceeding in a court of the United States to give it validity. ”
