Desperate Jump.
--On Tuesday afternoon last, as the York River train was running at full speed to this city, a conscript from King William county, who was on his way to Camp Lee in charge of an armed guard, jumped from the platform of the car on which he was standing, apparently escaping unhurt, although he finished off his experiment with some not very graceful tumbling down the embankment of the road. The guard, though appearing much perplexed at losing his man, concluded not to follow his example; and after watching him till he was out of his sight, quietly ordered the car and seated himself, doubtless concluding to make the best he could of his ill luck.