Southeast of Washington stretches a tapering peninsula, composed of four fertile counties, which at the remote tip make Point Lookout, and do not contain any town within them of more than a few hundred inhabitants. Tobacco has ruined the land of these, and slavery has ruined the people. Yet in the beginning they were of that splendid stock of Calvert and Lord Baltimore, but retain to-day only the religion of the peaceful founder. I mention it is an exceptional and remarkable fact, that every conspirator in custody is by education a Catholic. These are our most loyal citizens elsewhere, but the western shore of Maryland is a noxious and pestilential place for patriotism. The county immediately outside of the District of Columbia, to the south, is named Prince Gorgia's and the pleasantest village of this county, close to Washington, is called Surrattsville. This consists of a few cabins at a cross-road, surrounding a fine old hotel, the master whereof, giving the settlement his name, left the property to his wife, who for a long time carried it on with indifferent success. Having a son and several daughters, she moved to Washington soon after the beginning of the war and let the tavern to a trusty friend--one John Lloyd. Surrattsville has gained nothing in patronage or business from the war, except that it became at an early date, a rebel postoffice. The great secret mail from Matthias Creek, Virginia, to Port Tobacco, struck Surrattsville, and thence headed off to the east to Washington, going meanderingly north. Of this poet route Mrs. Surratt was a manageress; and John Lloyd, when he rented her hotel, assumed the responsibility of looking out for the mail, as well the duty of making Mrs. Surratt at home when she chose to visit him. So Surrattsville only ten miles from Washington, has been throughout the war a sect of conspiracy. It was like a suburb of Richmond, reaching quite up to the rival capital; and though the few Unionists on the peninsula knew its reputation well enough, nothing of the sort came out until the murder. Treason never found a better agent than Mrs. Surratt. She is a large, masculine, self-possessed female, mistress of her house, and as lithe a rebel as Belle Boyd or Mrs. Greenhough. She has not the flippantry and menace of the first, nor the social power of the second; but the rebellion has found no fitter agent. At her country tavern and Washington home Booth was made welcome, and there began the muttered murder against the nation and mankind.