"Ah! Mon cher Vidal, we are face to face in this affair with Jules Jeanjean, the most ingenious and most elusive criminal that we have met this century in France. In other walks of life Jeanjean would have been a great man—a millionaire financier, a Minister of the Cabinet, a great general—a leader of men. But in the circumstances this arch-adventurer, who slips through our fingers, no matter what trap we set for him, is a criminal of a type such as Europe has never known within the memory of living man. Personally I admire his pluck, his energy, his inventiveness, his audacity, his iron nerve, and his amazing cunning. Truly, now, cher ami, he is a marvel. There is but one master-criminal, Jules Jeanjean."

That was the character given him by Monsieur Hamard, the greatest French detective since Lecoq.

And now this master-criminal was beneath the railway arch at Cromer meeting in secret a mysterious cyclist!

What evil was now intended?

I waited, my ears strained to catch every sound. But I only heard the distant rumble of the thunder, away across the North Sea, and, somewhere, the dismal howling of a dog.

I waited, and still waited. The sky grew brighter, and I grew perceptibly colder, so that I turned up my coat-collar, and shivered, even though the previous day had been so unusually warm. The car smelt of petrol and oil—a smell that nauseated me—and yet my face was turned to the open country ready to follow and track down the man who had swept past me to keep that mysterious tryst in the darkness.

Looking back, I saw, away to the right, the white shafts of light from the high-up lighthouse, slowly sweeping the horizon, flashing warning to mariners upon that dangerous coast, while, far away in the distance over the sea, I could just discern a flash from the lightship on the Haisboro' Sands.

In the valley, deep below, lay Cromer, the street-lamps reflecting upon the low storm-clouds. At that moment the thunder-storm threatened to burst.

Yet I waited, and waited, watching the rose of dawn slowly spreading in the Eastern sky.