It is understood that the party alluded to as under arrest here, states that the original design of the conspirators was merely to capture President Lincoln, some time back, and make him a prisoner, and in this way compel a general release of all rebel prisoners then held by the United States.
When the general exchange of prisoners commenced, this project was abandoned by him and others as no longer necessary, and he says he refused to have anything further to do with it and endeavored to induce others to give up their designs upon the life of the President…