...oden steam gunboats of ten guns each, viz: The Gaines, Captain Thos. Hunter; the Morgan, Captain Blair; the Selma, Captain P. U. Murphy; the revenue cutter Alert, under a Lieutenant; the rain Baltic, Captain Johnson . Besides these vessels, the rebels are building, at Selma, a fifty gun frigate, iron-clad which they intend floating down the river on hog heads. There are now two rams ready at that point, and o...