"Yes, they date from five-and-twenty years ago," Gronau interrupted him. "And yet it is precisely of what then occurred that I wish to speak,--to pray you to inform me what has become of our--excuse me--of my former friend, Benno Reinsfeld?"

The question was so sudden and unexpected that Nordheim was silenced for a moment, but he was too entirely accustomed to self-control to be long disconcerted by such surprises. One suspicious glance he shot at his questioner, and then, with a shrug, he replied, coldly,--

"You really demand too much of my memory, Herr Gronau. I cannot possibly call to mind all the acquaintances of my youth, and in this instance I do not even remember the name you mention."

"Indeed? Then let me assist your memory, Herr President. I allude to the inventor of the first mountain-railway locomotive,--the engineer, Benno Reinsfeld."

The men looked each other in the eye, and instantly the president knew that there was nothing accidental in his visitor's presence, that he was confronting a foe, and that the words which sounded so innocent barely disguised a menace. He must next know whether the man appearing thus after years of exile were really dangerous, or whether this were merely an attempt to extort money from his possible fears. Nordheim seemed inclined to the latter belief, for he said, frigidly, "You must be falsely informed, I invented the first mountain-locomotive, as is shown by my patent."

Gronau suddenly rose, his dark face flushed still darker. He had devised a regular scheme of action, arranged in his mind how he should attack his opponent and drive him into a corner, until not a chance of escape was left him, but at such audacious falsehood all his prudent plans fell to pieces, and honest indignation got the upper hand of him.

"You dare to tell me that to my face!" he burst out, angrily. "To me, who was present when Benno showed us his invention, and explained it, and you admired it, and praised him! Does your memory play you false there also?"

The president calmly reached for the bell-rope: "Will you leave the house, Herr Gronau, or must I call the servants? I am not inclined to submit to insult beneath my own roof."

"I advise you to let the bell alone," Gronau burst forth, furiously. "Take your choice, whether what I have to say shall be said to you alone, or to all the world. Refuse to listen,--I can find a hearing everywhere else."

The threat was not without effect; Nordheim slowly withdrew his hand. He saw that it would not be easy to deal with this resolute, determined man, and that it would be best not to provoke him further, but his voice was still impassive as he said, "Well, then, what have you to say to me?"