could not tell which one to bomb. We did manage to hit some, though with what effect we could not tell."
"Then the German gun is still a mystery," observed Tom.
"It is. But we shall discover it soon. We will never rest until we do!"
So more and new and different theories continued to be put forth regarding the big cannon, if such it was. Ordnance experts wrote articles, alike in London, Paris, and New York, explaining that it was possible for a cannon to be within the German lines and still send a shell into the French capital. But few believed that it was feasible. The general opinion was that the gun was of comparative short range and was hidden much nearer Paris than the sixty or seventy-odd miles away, beyond which stretched the German line of trenches.
Meanwhile Tom, though making careful inquiries, had learned nothing of his father. He did not feel it would be wise to cable back home, and ask what the news was there.
"It might spoil dad's plans if I did that," said Tom to his chum, "and it would worry the folks in Bridgeton to know that I haven't yet seen him in France. No, I'll just have to wait."
And wait Tom did, though there is no harder task in all the world.
