To support the charge against Bollmann and Swartwout, said Marshall, "war must be actually levied.... To conspire to levy war, and actually to levy war, are distinct offenses. The first must be brought into open action by the assemblage of men for a purpose treasonable in itself, or the fact of levying war cannot have been committed." It was not necessary for the commission of this crime that a man should actually "appear in arms against his country.... If a body of men be actually assembled for the purpose of effecting by force a treasonable purpose; all those who perform any part, however minute, or however remote from the scene of the action, and who are actually leagued in the general conspiracy, are to be considered as traitors."[939] This passage was soon to cause Marshall great embarrassment when he was confronted with it in the trial of Aaron Burr at Richmond.
Did this mean that men who go to the very edge of legal boundaries—who stop just short of committing treason—must go scathless? By no means! Such offenses could be and must be provided for by statute. They were not, like treason, Constitutional crimes. "The framers of our Constitution ... must have conceived it more safe that punishment in such cases should be ordained by general laws, formed upon deliberation, under the influence of no resentments, and without knowing on whom they were to operate, than that it should be inflicted under the influence of those passions which the occasion seldom fails to excite, and which a flexible definition of the crime, or a construction which would render it flexible, might bring into operation."
This was a direct rebuke to Jefferson. There can be no doubt that Marshall was referring to the recent attempt to deprive Bollmann and Swartwout of the protection of the courts by suspending the writ of habeas corpus. "It is, therefore, more safe," continued Marshall, "as well as more consonant to the principles of our constitution, that the crime of treason should not be extended by construction to doubtful cases; and that crimes not clearly within the constitutional definition should receive such punishment as the legislature in its wisdom may provide."
What do the words "levying war" mean? To complete that crime, Marshall repeated, "there must be an actual assemblage of men for the purpose of executing a treasonable design ... but no conspiracy for this object, no enlisting of men to effect it, would be an actual levying of war."[940] He then applied these principles to the testimony. First he took up the deposition of Eaton[941] which, he said, indicated that the invasion of Mexico "was the immediate object"[942] that Burr had in mind.
But, asked the Chief Justice, what had this to do with Bollmann and Swartwout? The prosecution connected the prisoners with the statements made in Eaton's deposition by offering the affidavit of General Wilkinson, which included his version of Burr's celebrated letter. Marshall then overruled the "great and serious objections made" to the admission of Wilkinson's affidavit. One of these objections was to that part which purported to set out the Wilkinson translation of the Burr cipher, the original letter not having been presented. Marshall announced that "a division of opinion has taken place in the court," two of the Judges believing such testimony totally inadmissible and two others holding that it was proper to consider it "at this incipient stage of the prosecution."
Thereupon Marshall analyzed Wilkinson's version of Burr's confidential cipher dispatch.[943] It was so vague, said the Chief Justice, that it "furnishes no distinct view of the design of the writer." But the "coöperation" which Burr stated had been secured "points strongly to some expedition against the territories of Spain."
Marshall then quoted these words of Burr's famous message: "'Burr's plan of operations is to move down rapidly from the falls on the 15th of November, with the first 500 or 1,000 men in the light boats now constructing for that purpose, to be at Natchez between the 5th and 15th of December, there to meet Wilkinson; then to determine whether it will be expedient in the first instance to seize on, or to pass by, Baton Rouge. The people of the country to which we are going are prepared to receive us. Their agents now with Burr say that if we will protect their religion, and will not subject them to a foreign power, in three weeks all will be settled.'"
This language was, said Marshall, "rather more explicit." But "there is no expression in these sentences which would justify a suspicion that any territory of the United States was the object of the expedition. For what purpose seize on Baton Rouge? Why engage Spain against this enterprise, if it was designed against the United States?"[944]
Burr's statement that "the people of the country to which we are going are prepared to receive us," was, said Marshall, "peculiarly appropriate to a foreign country." And what was the meaning of the statement: "Their agents now with Burr say, that if we will protect their religion, and will not subject them to a foreign power, in three weeks all will be settled"? It was not probable that this referred to American citizens; but it perfectly fitted the Mexicans. "There certainly is not in the letter delivered to General Wilkinson ... one syllable which has a necessary or a natural reference to an enterprise against the territory of the United States."
According to Wilkinson's affidavit, Swartwout knew the contents of the dispatch he was carrying; Wilkinson had deposed that Burr's messenger had frankly said so. Without stating that, in his long journey from New York through the Western States and Territories in quest of Wilkinson, he had "performed on his route any act whatever which was connected with the enterprise," Swartwout had declared "their object to be 'to carry an expedition to the Mexican provinces.'"[945] This, said Marshall, was "explanatory of the letter of Col. Burr, if the expressions of that letter could be thought ambiguous."