“Wilberz was here in Brussels a month ago, and told me what he was doing. Truly the ring of forts will stand a very poor chance when you make the attack.”

“Belgium will never dare to resist, we feel sure,” declared Captain von Silberfeld. “In a month the Crown Prince will enter Paris. But I must get away at once. I have to be back in Cologne with the dawn. The Staff are awaiting your reports with eagerness, especially those upon the financial position.”

“I have supplied every detail,” responded the banker. “The position is not good, and even my friend the Baron de Neuville cannot, I happen to know, come to the rescue at the present moment.”

“Good,” exclaimed the Captain, dropping into German. “Adieu!” he said, placing the bulky envelope beneath his cotton dust-coat. “What excitement there is in the streets—eh?”

The banker laughed grimly.

“It will increase very soon, I suppose,” he said.

“Yes,” whispered the other, as they descended to the front entrance together, where the long, powerful, low-built car stood with its glaring headlights, in charge of a smart chauffeur, who saluted in military fashion. “Adieu, my dear Arnaud. I must hasten,” he whispered, “for to-morrow’s dawn will bring to us ‘The Day’!”

And with a triumphant wave of his hand he mounted beside the driver, and a moment later the car moved swiftly and silently down the hill on its long journey to the German frontier, carrying with it the final secret report of the many made through the last ten years by the traitor Arnaud Rigaux to the Prussian General Staff.

The man who had sold his country for German gold stood for a few seconds watching the car disappear into the night, and then, as the roar of the crowd making a demonstration before the French Consulate farther up the Boulevard fell upon his ears, he turned, and with a bitter laugh of triumph, went within and closed the great oaken door.

A silence fell. No one was near. Suddenly, a few moments later, the dark figure of a man, who had evidently been watching the departure of the car, as he stood back in the deep shadow of the trees in the centre of the boulevard, emerged, crossed the road, and hurried down the hill in the direction the car had taken.