It would not be a good thing for me to go into details of this. It might suggest ideas to other people which they have not thought of, and they would not be likely to give us any of their ideas in exchange. All I will say is that untiring vigilance and mind-searching must be devoted to the subject, because the enemy is crafty and cunning and full of novel treacheries and stratagems. The House may be assured that the utmost ingenuity is being displayed and imagination is being evoked from large numbers of competent officers, well-trained in tactics and thoroughly up to date, to measure and counterwork novel possibilities. Untiring vigilance and untiring searching of the mind is being, and must be, devoted to the subject, because, remember, the enemy is crafty and there is no dirty trick he will not do