O'Callaghan v. O'Brien — Opinion of the Court
“ Thus, if a state law provides for any form of notice on an application to probate a will, and authorizes a contest before the admission of the writing to probate, then it would follow, if the words 'suit or action of inter partes' embraces such a contest, the proof of wills, if contested by a citizen of another state or alien, would be cognizable in the courts of the United States, and hence not under the exclusive control of the state probate court. ”
