On the afternoon of the 4th of June, Major-General Meade ordered the United States Marshal at Watertown, N.Y., to intercept, seize and hold two carloads of Fenian war material which were on the way from Rome to Potsdam Junction and Malone. On arrival of the train at Watertown the Deputy Marshal was in waiting and promptly carried out the instructions. A carload of Fenian soldiers who were on the same train got off the car and angrily remonstrated with the officer when they learned of the seizure, but he was obdurate and retained possession of the two cars, which he had side-tracked. The Fenians remained at Watertown and began plotting for the recapture of the arms and ammunition. Not realizing that any interference with the majesty of the law would be attempted, the Marshal did not deem it necessary to place a strong guard over the two cars, and the Fenians determined to re-possess them. On arrival of the evening express train from the south they gathered around it and captured not only that train, but their two cars of supplies, and taking charge themselves, ran the whole outfit off to De Kalb Junction before they were recaptured. Several other instances of defiance of lawful authority were reported, but Gen. Meade meant _business_, and these infractions of his orders and the laws of the United States only served to make him more determined than ever to strangle the hopes of the Fenians before they had an opportunity of carrying out their designs. PRESIDENT JOHNSON'S PROCLAMATION. The tardy proclamation of President Johnson was finally issued on the 6th of June, almost a week after the Fenians, under Gen. O'Neil had crossed over the Niagara. Its delay seemed significant to the Canadian people, as the President and his Cabinet were fully aware that the Fenians had been making active preparations for months previously to invade Canada, and made no secret of their intentions. The following is the text of the proclamation:-- By the President of the United States of America--A Proclamation. Whereas, it has become known to me that certain evil-disposed persons have, within the territory and jurisdiction of the United States, begun and set on foot, and have provided and prepared, and are still engaged in providing and preparing, means for such a military expedition and enterprise to be carried on from territory and jurisdiction of the United States against colonies, districts and people of British North America within the dominions of the United Kingdom of Great Britain and Ireland, with which said colonies, districts, and people, and kingdom, the United States are at peace; and whereas, the proceedings aforesaid constitute a high misdemeanor, forbidden by the laws of the United States as well as by the laws of nations;