DEAR SIR,--Your favor of the 6th instant, on the subject of Burr's offences, was received only four days ago. That there should be anxiety and doubt in the public mind, in the present defective state of the proof, is not wonderful; and this has been sedulously encouraged by the tricks of the judges to force trials before it is possible to collect the evidence, dispersed through a line of two thousand miles from Maine to Orleans. The federalists, too, give all their aid, making Burr's cause their own, mortified only that he did not separate the Union or overturn the government, and proving, that had he had a little dawn of success, they would have joined him to introduce his object, their favorite monarchy, as they would any other enemy, foreign or domestic, who could rid them of this hateful republic for any other government in exchange. The first ground of complaint was the supine inattention of the administration to a treason stalking through the land in open day. The present one, that they have crushed it before it was ripe for execution, so that no overt acts can be produced. This last may be true; though I believe it is not. Our information having been chiefly by way of letter, we do not know of a certainty yet what will be proved. We have set on foot an inquiry through the whole of the country which has been the scene of these transactions, to be able to prove to the courts, if they will give time, or to the public by way of communication to Congress, what the real facts have been. For obtaining this, we are obliged to appeal to the patriotism of particular persons in different places, of whom we have requested to make the inquiry in their neighborhood, and on such information as shall be voluntarily offered. Aided by no process or facilities from the _federal_ courts, but frowned on by their new born zeal for the liberty of those whom we would not permit to overthrow the liberties of their country, we can expect no revealments from the accomplices of the chief offender. Of treasonable intentions, the judges have been obliged to confess there is probable appearance. What loophole they will find in the case, when it comes to trial, we cannot foresee. Eaton, Stoddart, Wilkinson, and two others whom I must not name, will satisfy the world, if not the judges, of Burr's guilt. And I do suppose the following overt acts will be proved. 1. The enlistment of men, in a regular way. 2. The regular mounting of guard round Blennerhasset's island when they expected Governor Tiffin's men to be on them, _modo guerrino arraiati_. 3. The rendezvous of Burr with his men at the mouth of Cumberland. 4. His letter to the acting Governor of Mississippi, holding up the prospect of civil war. 5. His capitulation regularly signed with the aids of the Governor, as between two independent and hostile commanders.