...eply, that it could not be procured. I urged the importance of obstructions to Col. Wright, commandant of the post, and he agreed with me, but said, he had no authority to obstruct the channel. Gen. Hill was here November fourteenth. I spoke to him on the subject, and he went to Norfolk, saying that he would try to send down a pile-driver. He was soon after ordered to another post, and the pile-d...