SEPTEMBER 1ST. —The press and congressional critics are opening their batteries on the Secretary of War, for incompetency. He is not to blame. A month ago, Capt. Lee, son of the general, and a good engineer, was sent to the coast of North Carolina to inspect the defenses. His report was well executed ; and the recommendations therein attended to with all possible expedition. It is now asserted that the garrison was deficient in ammunition. This was not the case. The position was simply not tenable under the fire of the U. S. ships of war.