"When one is fighting a paper-war one uses paper-war tactics that in the long run can be just as lethal as high explosive. And the tactics are not limited in scope by use of one material. The said material is very variable in form. Paper can convey a private warning, a public threat, secret temptation, open defiance; wall-bills, window-stickers, leaflets dropped by the thousands from the roof-tops, cards left on seats or slipped into pockets and purses... money."