By great good fortune, there was only one big trunk in the hold, and it was readily accessible. The rest of Nash’s luggage was in his cabin. We soon had the lot on board the destroyer, where the torpedo officer rapidly overhauled it.

In the big trunk, resting quite unconcealed on the top of a pile of clothes, were two tin canisters labelled “Golden Syrup.” I could not repress a shudder.

“I think this is what we want,” said the torpedo officer grimly, as he carefully picked up the dangerous canisters. And then he did a brave thing.

“If you don’t mind, sir,” he said to the Captain, “I will take them out in a boat and examine them myself.”

The Captain nodded silently, and a few minutes later the ship’s dinghy dropped over the side. The torpedo officer took his seat and rowed away alone, the canisters on the after-thwart winking in the blazing sunshine. He was literally taking his life in his hands. We could not let the liner go until we were sure we had got what we wanted, and no one could be sure that the mere lifting of the canister lids would not explode the terrible compound they contained.

Half a mile away from the ship the rowing-boat came to a stop. Through our glasses we saw the torpedo officer deliberately pick up the canisters and without hesitation prise up the patent lids. A moment later he waved to us, and at once commenced to row back to the ship.

“All right, let her go; I’ve got the stuff,” he shouted, as soon as he was within earshot, and a tremendous cheer went up from the crew, who in the mysterious “wireless” of the sea had learned what was afoot. A signal fluttered from the bridge of the destroyer. The Angorania dipped her pennant in acknowledgment, and soon the great liner was hurling herself through the sea on her interrupted journey.

The rest of the story is soon told. The herbethite, we found, was covered with a thin layer of sweets, and at the customs examination of luggage Nash had boldly lifted the lids and coolly showed the sweets to the officer. It was done so naturally as to defy any possible suspicion. But in the bottoms of the tins we found two exquisitely made detonators, fashioned in the shape of watches, and timed so as to explode the herbethite some twelve hours after the time fixed for the departure of the ship. These removed, the tins could be handled with comparative safety.

We made a clean sweep of the conspirators. No details were ever given to the public, and the stoppage of the big liner was easily explained away to the passengers. We found out that the small cylinder picked up at Mile End had been intended for the purpose of blowing up a munitions train in an important tunnel outside London, but the conspirators found the approaches too closely guarded and gave up the project. They were all sent to Paris for trial on a charge of stealing herbethite, and were eventually sentenced by court-martial to fifteen years’ imprisonment.

Madame Gabrielle, I am glad to say, received a handsome reward from the British Government, for our success was entirely due to her. She had followed Norman without food or rest or sleep for nearly three days, and was in the last extremity of fatigue when she gave me her final and all-important message. Pasquet, I am glad to say, justified the impression I had formed of him, and I had the satisfaction of seeing him develop into a respectable member of society, happy in the society of his wife, now fully restored to health, and again enjoying the confidence of his employers. We were able, through him, to account for all the stolen herbethite, and it was a relief to know that none of the terrible compound remained in the hands of our enemies.