The laws in force provide sufficient penalties for the punishment of such offenses after they have been committed, and provided the parties can be found, but the Executive is powerless in many cases to prevent the commission of them, even when in possession of ample evidence of an intention on the part of evil-disposed persons to violate our laws. Your attention is called to this defect in our legislation. It is apparent that the Executive ought to be clothed with adequate power effectually to restrain all persons within our jurisdiction from the commission of acts of this character. They tend to disturb the peace of the country and inevitably involve the Government in perplexing controversies with foreign powers. I recommend a careful revision of all the laws now in force and such additional enactments as may be necessary to vest in the Executive full power to prevent injuries being inflicted upon neighboring nations by the unauthorized and unlawful acts of citizens of the United States or of other persons who may be within our jurisdiction and subject to our control. In illustration of these views and to show the necessity of early action on the part of Congress, I submit herewith a copy of a letter received from the marshal of the northern district of New York, who had been directed to repair to the frontier and take all authorized measures to secure the faithful execution of existing laws. M. VAN BUREN. BUFFALO, _December 28, 1837_. His Excellency M. VAN BUREN. SIR: This frontier is in a state of commotion. I came to this city on the 22d instant, by direction of the United States attorney for the northern district of this State, for the purpose of serving process upon individuals suspected of violating the laws of the United States enacted with a view to maintain our neutrality. I learned on my arrival that some 200 or 300 men, mostly from the district of country adjoining this frontier and from this side of the Niagara, had congregated upon Navy Island (Upper Canada), and were there in arms, with Rensselaer van Rensselaer, of Albany, at their head as commander in chief. From that time to the present they have received constant accessions of men, munitions of war, provisions, etc., from persons residing within the States. Their whole force is now about 1,000 strong, and, as is said, are well supplied with arms, etc. Warrants have been issued in some cases, but no arrests have as yet been effected. This expedition was got up in this city soon after McKenzie's arrival upon this side of the river, and the first company that landed upon the island were organized, partially at least, before they crossed from this side to the island.