"Hullo!" he said. "How did you get out?"

"I want to help!" said Harry, inspired. "I haven't done anything really wrong, have I? Oughtn't I be allowed to do whatever I can, now that something like this has happened?"

"Go along with you!" said the inspector. "All right! But you'd better come back—because we've got your motorcycle, and we'll keep that until you come back for it."

But it made little difference to Harry that he was, so to speak, out on bail. The great thing was that he was free. He rushed out, but he didn't make for the scene of the disaster to the reservoir, caused, as he had guessed, by some spy. All the town was pouring out now, and the streets were full of people making for the place where the explosion had occurred. It was quite easy for Harry to slip through them and make for London. He did not try to get his cycle. But before he had gone very far he over took a motor lorry that had broken down. He pitched in and helped with the slight repairs it needed, and the driver invited him to ride along with him.

"Taking in provisions for the troops, I am," he said. "If you're going to Lunnon, you might as well ride along with me. Eh, Tommy?"

His question was addressed to a sleepy private, who was nodding on the seat beside the driver. He started now, and looked at Harry.

"All aboard!" he said, with a sleepy chuckle. "More the merrier, say I! Up all night—that's what I've been! Fine sort of war this is? Do I see any fightin'? I do not! I'm a bloomin' chaperone for cabbages and cauliflowers and turnips, bless their little hearts!"

Harry laughed. It was impossible not to do that.

But he knew that if the soldier wanted fighting, fighting he would get before long. Harry could guess that regular troops—and this man was a regular—would not be kept in England as soon as the territorials and volunteers in sufficient number had joined the colors. But meanwhile guards were necessary at home.

He told them, in exchange for the ride, of the explosion and the flood that had probably followed it.