...ast of the Atchafalaya, the country had already been in good part overrun by our forces; but our possession of it was imperfect and debated. Beyond and above, all was Rebel; while fortifications at Butte à la Rose, well up the Atchafalaya, and Fort Bisland, at Pattersonville, on the Teche, were intended to bar ingress by our gunboats from Red river or by our land forces from New Orleans. For...