Mahlon Pitney, Cissna v. Tennessee (246 U.S. 289…
“ Obviously, whether two states of the Union, either by long acquiescence in a practical location of their common boundary, or by agreement otherwise evidenced, have definitely fixed or changed the limits of their jurisdiction as laid down by the authority of the general government in treaty or statute, is in its nature a federal question. We have stated briefly, in Arkansas v. Tennessee, the reasons why we are unable to concur with the state court in its decision upon this point. ”
