"Well, no. I strained a muscle or two in scuffling with those gentlemen--and I've had nothing but newspaper since eight o'clock. By the way, you may as well take the only clue we have--this scrap of pulp. It is French, as you see. And, Teddy, don't get into hot water on my account. The resources of civilisation--as expressed in high explosives--are not exhausted."

Burton stuffed the newspaper into his pocket, and in three minutes was already well on the way to Folkestone. Micklewright watched the flying-boat until it was lost to sight; then, pressing his hand to his aching side, he returned slowly to the house.

The distance from the Luddenham Marshes to Folkestone is about twenty-five miles as the crow flies, and Burton had made the flight once in his flying-boat. Consequently, he was at no loss in setting his course. A brisk south-west wind was blowing, but it very little retarded his speed, so that he felt pretty sure of reaching the harbour by four o'clock. Keeping at an altitude of only a few hundred feet, he was able to pick up the well-known landmarks: Hogben's Hill, the Stour, the series of woods lying between that river and the Elham valley railway line; and just before four he alighted on the sea leeward of the pier, within a few yards of the steamer.

A small boat took him ashore. He avoided the crowd of holiday makers who had already gathered to watch him, and making straight for the pier, accosted a police inspector.

"Have you seen three men ride up on motor cycles, inspector?" he asked.

"No, sir, I can't say I have."

"Three foreigners, one a tall big fellow?"

"Plenty of foreigners have gone on board, sir. Is anything wrong?"

"Yes, they've assaulted and robbed a friend of mine--you may know his name: Dr. Bertram Micklewright, the inventor. They've stolen Government property, and it's of the utmost importance to prevent their crossing the Channel."

"Where did this take place, sir, and at what time?"