“ That the navigation of the Mississippi river is free to every citizen of the United States is a fact not to be questioned at this time. No one could successfully dispute it; but we think that question is not involved in this case. ”

“ As the boat is free to be navigated without molestation, let, or hindrance on account of any fees, taxes, licenses, or otherwise, it cannot be held that the navigation of the Mississippi river is not free, because, while within the boundaries of the state of Tennessee, and under the authority of the act of Congress, the barkeeper on the boat is prohibited from there selling the liquors he carries with him, without first having paid the license demanded by the state statute. ”

“ Many cases are cited in counsel's brief where tangible property was directly taxed by the state, and where it was held that the state had no jurisdiction, because, although the property was temporarily within the state, it was not there permanently. ”