I do not forget the retroactive statute passed on the last day of the session, declaring that all the acts, proclamations, and orders of the President respecting the army and navy, and calling out or relating to the militia or volunteers, are approved, and in all respects legalized and made valid, to the same intent and with the same effect as if they had been issued and done under the previous express authority and direction of Congress. The clause in the Constitution against _ex post facto_ laws has been restricted by judicial interpretation to criminal matters; but I doubt if even this much questioned interpretation would sanction such a retroactive effect as is now proposed. So much, at least, I do know: the Senate is judge, without appeal, with regard to the seats of its members; and I am sure it will not unseat a Senator by a strained application of an _ex post facto_ statute. The conclusion is twofold: first, that at the time in question General Lane was not a Senator; and, secondly, that at the time in question he was not a Brigadier. The whole case is unreal. It is a question between an imaginary Senator and an impossible Brigadier; or rather, it is a question whether an imagined seat in this body was lost by alleged acts under an impossible military commission. The seat of the Senator did not become a reality until some days after General Lane is supposed to have vacated it; and the military commission did not become a possibility until several weeks after General Lane had abandoned it. Of course, with this view of the law on these two decisive points, it becomes entirely unnecessary to consider the multifarious and indefinite evidence with regard to what General Lane did in the way of accepting his military commission; because nothing that he did, and nothing that he could do, under that impossible commission, would operate legally in the present case. In reply to Mr. Davis, of Kentucky, Mr. Sumner spoke further. I have no desire to follow at length the Senator from Kentucky, but I venture to ask the attention of the Senate simply to one of the points he has presented. According to him, General Lane, when elected as Senator, by the mere fact of his election became Senator, so that the Constitution operated to create an incompatibility between the function of Senator and the new office which it is said he accepted. The Senator from Kentucky, as I understood, argued that the function of the Senator, at least for the purpose of this case, commences with his election. MR. DAVIS. Will the Senator from Massachusetts permit me to ask him a question? MR. SUMNER. Certainly, if the Senator will allow me just to make my statement. The Senator, I say, assumes that the function of the Senator, at least for the purposes of this case, commences with his election; and in support of that assumption he quotes the Constitution of the United States, as follows:--