He opened his address by reminding the Court that the question of their jurisdiction to try and sentence the accused was for the Court alone to decide, and that no mandate of the President, if in fact and in law the Constitution did not tolerate such tribunals in such cases, could protect any member of the Commission from the consequences of his illegal acts. He then advanced and proved the following propositions: that none but military offenses are subject to the jurisdiction of military courts, and that the offenders when they commit such offenses must be subject to military jurisdiction—in other words, must belong to the army or navy; that the President himself had no right to constitute military courts of his own motion, but that such power must first be exercised by Congress under the constitutional grant to that body to make rules for the government and regulation of the land and naval forces; that, by the fifth and sixth amendments of the constitution, every person, except those belonging to the land or naval forces or to the militia in active service in time of war, and, being such, committing a military or naval crime, is guaranteed an investigation by a grand jury as a preliminary to trial, and a speedy and public trial by an impartial jury. He then took up and examined the grounds on which the jurisdiction of the Commission was sought to be maintained. Calling the Court’s attention to the constitutional provision that, if the institution of such Commission was an incident to the war power, that power was lodged exclusively in Congress and not at all in the President, and, therefore, Congress only could authorize such tribunals, he showed that, neither by the articles of war nor by the two acts, relied on, passed during the Rebellion, had Congress ever authorized any such tribunal; and that a military commission like the present and under present circumstances “is not to be found sanctioned, or the most remotely recognized, or even alluded to, by any writer on military law in England or the United States, or in any legislation of either country.”

And, in this connection, he pronounced the suggestion that the civil courts and juries of the District of Columbia could not safely be relied upon for the trial of these cases, “an unjust reflection upon the judges, upon the people, upon the marshal, an appointee of the President, by whom the juries were summoned, and upon our civil institutions themselves;” and he closed his remarks upon this branch of his subject by saying that the foregoing suggestion,

“upon another ground, is equally without force. It rests on the idea that the guilty only are ever brought to trial; that the only object of the Constitution and laws in this regard is to afford the means to establish alleged guilt; that accusation, however made, is to be esteemed prima facie evidence of guilt, and that the Executive should be armed, without other restriction than his own discretion, with all the appliances deemed by him necessary to make the presumption from such evidence conclusive. Never was there a more dangerous theory. The peril to the citizen from a prosecution so conducted, as illustrated in all history, is so great that the very elementary principles of constitutional liberty, the spirit and letter of the Constitution itself repudiated it.”

After depicting the peril to the rights of the citizen of confiding to the option of the Executive the power of substituting a secret for a public tribunal for the trial of offenses, he established the following propositions: That the creation of a Court is an exclusively legislative function; that constitutional guarantees are designed for times of war as well as times of peace; that the power to suspend the writ of Habeas Corpus carries with it only the temporary suspension of the right to inquire into the cause of the arrest, and does not extend in any way over the other rights of the accused. The distinguished advocate then further maintained that, conceding the articles of war provide for a military court like this, yet the offense charged in the present case being nothing less than treason could not under the provision of the constitution, regulating the trial of treason, be tried by a military commission; and, also, that under the articles of war persons who were not and never had been in the army were not subject to military law. And, in order to illustrate this branch of his argument as forcibly as possible, passing in review the guaranteed and historic rights of accused persons on trials before civil courts, he arrayed the open and flagrant violations of these rights which had been permitted by the Commission on the present trial: First, in the character of the pleadings, which for indefiniteness and duplicity would not have been tolerated by any civil tribunal. Second, as to the rules of evidence, which, according to the Judge-Advocate, allowed proof of separate and distinct offenses alleged to have been committed, not only by the parties on trial, but by other persons, and which the accused, however innocent, could not be supposed able to meet. Third, he quoted Lord Holt to show that in a civil court “these parties could not have been legally fettered during their trial.” Referring to the row of miserable beings weighed down with shackles as they had entered the court-room, as they confronted their epauletted judges, and as they departed to their solitary cells, day by day, for more than a month, he repeated the words of the great jurist, then 200 years old:

“Hearing the clanking of chains, though no complaint was made to him, he said, ‘I should like to know why the prisoner is brought in ironed. Let them be instantly knocked off. When prisoners are tried they should stand at their ease.’”

Then, characterizing the claim, that martial law prevailing in the District of Columbia therefore warranted the Commission, as alike indefensible and dangerous, and at the same time irrelevant because martial law had never been proclaimed and the civil courts were in the full and undisturbed exercise of all their functions, the counsel drove this point home as follows:

“We learn, and the fact is doubtless true, that one of the parties, the very chief of the alleged conspiracy, has been indicted, and is about to be tried before one of those courts. If he, the alleged head and front of the conspiracy, is to be and can be so tried, upon what ground of right, of fairness or of policy, can the parties who are charged to have been his mere instruments be deprived of the same mode of trial?”

At the close of his speech he recurs to the warning that the President’s command can furnish no justification to the members of the tribunal. If their function were only to act as aides to the President to enable him to discharge his prerogative of punishment, and is to that extent legal, then it is only so because the President might have dispensed with the Court altogether, and ordered the punishment of the culprits without any formal trial.

No, he warned them, in the most courtly and courteous manner, they could not shield themselves behind the President.

“Responsibility to personal danger can never alarm soldiers who have faced * * * death on the battle-field. But there is a responsibility that every gentleman, be he soldier or citizen, will constantly hold before him and make him ponder—responsibility to the constitution and laws of his country and an intelligent public opinion—and prevent his doing anything knowingly that can justly subject him to the censure of either. I have said that your responsibility is great. If the Commission under which you act is void and confers no authority, whatever you may do may involve the most serious personal liability.”