...inforcing Rosecrans, will dispatch troops to General Johnston as rapidly as possible. On the eleventh of April, I again telegraphed General Cooper, A. and I. G., and General J. E. Johnston, at Tullahoma , as follows: A scout from Austin reports that forty transports, loaded down, but without troops, passed up the Mississippi River, on the third and fourth instant. Brigadier-General Chalmers report...