The Government, it will be remembered, endeavoured to suppress its publication, because it contained many serious truths, which it was deemed best should be withheld from the public, and on its publication--in defiance of the statements in the House of Commons, and the pressure brought upon me by the Prime Minister--I was denounced as a panicmonger. But have not certain of my warnings already been fulfilled? I have no desire to create undue alarm. I am an Englishman, and, I hope, a patriot. What I have written in this present volume in the form of fiction is based upon serious facts within my own personal knowledge. That German spies are actively at work in Great Britain is well known to the authorities. The number of agents of the German Secret Police at this moment working in our midst on behalf of the Intelligence Department in Berlin are believed to be over five thousand. To each agent--known as a "fixed-post"--is allotted the task of discovering some secret, or of noting in a certain district every detail which may be of advantage to the invader when he lands. This "fixed-agent" is, in turn, controlled by a travelling agent, who visits him regularly, allots the work, collects his reports, and makes monthly payments, the usual stipend varying from £10 to £30 per month, according to the social position of the spy and the work in which he or she may be engaged. The spies themselves are not always German. They are often Belgians, Swiss, or Frenchmen employed in various trades and professions, and each being known in the Bureau of Secret Police by a number only, their monthly information being docketed under that particular number. Every six months an "inspection" is held, and monetary rewards made to those whose success has been most noteworthy. The whole brigade of spies in England is controlled by a well-known member of the German Secret Police in London, from whom the travelling agents take their orders, and in turn transmit them to the "fixed-posts," who are scattered up and down the country. As I write, I have before me a file of amazing documents, which plainly show the feverish activity with which this advance guard of our enemy is working to secure for their employers the most detailed information. These documents have already been placed before the Minister for War, who returned them without comment! He is aware of the truth, and cannot deny it in face of these incriminating statements.