The gunboat Engagement on James river.
--The Petersburg Express learns from an informant just from Fortress Monroe that the late Yankee gunboat expedition up James river suffered very much in damage of craft as well as loss of men. The wooden boat is said to have been riddled by our field places from the shore, and many lives were lost.--The Captain of the boat, whose name we did not ascertain, fearing she was about to sink, made an effort to escape to the iron clad, and while in the act was struck by a solid shot and cut completely in two. Some eight or tun of the invaders are said to have been killed and many wounded. The boats, two, were very much damaged.