map all its resources, individually as well as collectively?

I know a building in the heart of the London financial district that
carries on its roof a Zeppelin-destroyer gun. A few days before I was
last in this building a fine-looking fellow in khaki uniform entered in
haste and asked the janitor to show him to the roof that he might
quickly inspect that gun and see that everything was in order, as raids
might be expected at any moment. Of course, he was taken to the roof,
and his inspection quickly completed. Ten minutes later the London
police were there to inquire for a man in khaki uniform.

The English officer said, "Very singular, we are ten minutes behind
that fellow everywhere. He is the cleverest of all the German spies,
and we are not able to catch him!"

If that spy had been caught in his English uniform inspecting English
defenses, would not everything have been kept quiet in the endeavor to
pick up the lines of his foreign communications?

In writing home from England, even to my family, toward the close of
1914, I thought it just as well to be brief and not too definite with
any information. I had seen some of the censorship regulations and
envelopes resealed with a paper bearing heavy black letters, "Opened by
censor," with the number of the censor, showing that there are more
than one hundred people engaged in this work; and also directions from
the censorship that "responses to this inquiry must be submitted,"
etc., etc.

Nobody could believe until this war broke out and there descended upon
peaceful Belgium not only armies and demands for their shelter,