Dan Sickles on Marylanders in the Confederate service.
--A dispatch from Washington says:‘ A military commission, of which General Dan Sickles was President, tried James R. Oliver, a citizen of Maryland, who was taken prisoner while in arms in the ranks and uniform of the rebel army at Rappahannock ford. He plead not guilty to the charge, (treason,) but acknowledged the specifications of his arrest. The Court rendered a decision of guilty of treason, and sentenced him to be hanged. General Hooker forwarded the sentence of the Court to Washington, with the endorsement "strongly approved;" but the President, seeing the terrible consequences involved in such a precedent, disapproved the sentence of the Court, adding that the accused was a prisoner of war, and entitled to be treated as such, and to be exchanged.
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