...irst to the mouth of the Red River, then up the Black and Tensas, both narrow streams, to Tensas Lake and Bayou Macon. The guerillas fancied they could carry on their raids with impunity. So when Selfridge appeared with his little flotilla on the 12th of July, they were taken by surprise. As soon as the gun-boats hove in sight the enemy's transports, of which there were here quite a number, made thei...