But what I am quite sure of is that its perusal was a source of great comfort and encouragement to me in the midst of our own struggle; because it assured me, as I compared Raglan's experience with ours, that we had not gone so far astray in learning our lesson, and were not so completely on the dunces' bench, as I had been disposed to fear. We had plenty of blunders to confess, and there was no room for over-confidence; but the book prompted every earnest soldier among us to believe that we could make still better use of our experience, and to feel bolder in relying on his own judgment and courage in drawing new expedients from our peculiar circumstances and in developing new adaptations of military science to our own campaigns. Staff schools cannot turn out great generals to order, and the man who leads will continue to be more important than any other element of an army; but no leader can work well with dull and antiquated tools, and the present generation can hardly see a great war begun with so little adequate preparation for it as was common before our great civil strife. On the 9th of November the humdrum routine at my district headquarters was interrupted by a dispatch from the officer commanding at Detroit, Michigan, giving warning of what was more explicitly reported in one of the 10th, saying that he was positively informed that within forty-eight hours two armed steamers would attack Johnson's Island and release the prisoners held there. [Footnote: Official Records, series ii. vol. vi. pp. 491, 495, 635.] The military prison at Johnson's Island was built for the confinement of Confederate officers who had been captured in battle, and their number was so large that to release them would be an enterprise of no little importance, if successful. The island lay in Sandusky Bay, within a few hours' sail of several Canadian ports. Its garrison consisted of a single regiment which had all the employment it needed to furnish the ordinary prison guards, and would be entirely too weak to oppose any considerable force attacking from without, especially as it would be prudent to assume that such an attack would be accompanied by an outbreak of the prisoners within.