The Summons by A.E.W. Mason

It has been said that Hillyard joined a service with its traditions to create. Indeed, it had everything to create, its rules, its methods, its whole philosophy. And it had to do this quickly during the war, and just for the war; since after the war it would cease to be. Certain conclusions had now been forced by experience quite definitely on Hillyard's mind. Firstly, that the service must be executive. Its servants must take their responsibility and act if they were going to cope with the intrigues and manoeuvres of the Germans. There was no time for discussions with London, and London was overworked in any case.

The Post Office, except on rare occasions, could not be used; telegrams, however ingenious the cipher, were dangerous; and even when London received them, it had not the knowledge of the sender on the spot, wherewith to fill them out. London, let it be admitted, or rather that one particular small section of London with which Hillyard dealt, was at one with Hillyard. Having chosen its men it trusted them, until such time as indiscretion or incapacity proved the trust misplaced; in which case the offender was brought politely home upon some excuse, cordially thanked, and with a friendly shake of the hand, shown the door.