We now know quite enough of German methods to be aware that our enemy's spies are not only singularly daring, but singularly resourceful. I know what a small, compact, portable station can do in skilled hands, and I am strongly of opinion that the risks we are running in this respect are not sufficiently appreciated--perhaps are not understood--by the authorities. Even to-day, in spite of the evidence that I and others have been able to bring forward for some years, and in spite even of numerous convictions during the past few months, there is too much of a tendency on the part of the Government to try to "save its face" by declaring that the spy peril is enormously exaggerated. No doubt they will endeavour to refute my arguments in these pages. They declared, for so long, that there were no German spies in England, that even to-day they are reluctant to take the drastic steps which the situation urgently demands. On no other supposition can we explain the unparalleled liberty accorded to thousands of Germans, whether naturalised or not, who are still permitted to live and move so freely among us. Some, indeed, have been interned, and afterwards released. Returning to the legal position of spies (after a digression perhaps not without its uses), it should be noted that the Hague regulations distinguish between a member of the armed forces and a private citizen. The soldier spy who has rejoined the army cannot, afterwards, be punished for his act of espionage. The civilian who acts as a spy enjoys, however, no such privilege. He has no business to meddle with military affairs, and, should he be captured at any time, he is liable to pay the penalty of his former deeds. Similarly, to harbour a spy is also a criminal offence. A person found guilty of espionage may either be hanged or shot; nowadays, the usual punishment is shooting, though the American code still prescribes hanging. In earlier times, also, he was liable to be executed on the spot, without formality of any kind. To-day, he must first be tried by court-martial in accordance with the established rules of martial law in the country in which the offence was committed. The position of civilians in an invaded territory who give or transmit to their own side information respecting the enemy's movements is not without interest to us now that threats of a German invasion are so freely indulged in by the Press of Germany, and preparations to defeat such an attack are being actively made by our own military authorities. There can be no doubt that if a resident of an occupied territory gives such information, he is guilty either of spying, or of a hostile act against the invader, amounting to war treason, and equally punishable by death. The "American Instructions" are very emphatic on this point. They say:--