The German hesitated, but presently the door swung open, and they were invited, in a surly tone, to enter. After leading the way to the reception room, Hoff went upstairs. Five minutes later Doctor Grantley put in an appearance.

“You’re certainly a cool one, Carter!” was his greeting. “What the devil are you doing here? I thought you had sense enough to let me alone after that farce of a trial. What new maggot is busy in your head now?”

“I have left you alone all these weeks, haven’t I?” Nick asked, in turn. “And I would have continued to do so if you hadn’t taken such an extraordinary step.”

A sneer distorted Grantley’s face.

“Ah, so you have heard of the Baldwin matter, have you?” he asked. “Well, what about it? What business is it of yours?”

“I shall make it my business just so far as I see fit, Grantley,” was the quiet answer. “Knowing that you are a murderer at heart, do you suppose I am going to stand by with folded hands and let you get one of the most valuable lives in the country under your knife, without doing everything in my power to prevent it?”

“But it doesn’t happen to be in your power, my friend. You have no standing at all in this affair. It is purely a matter for Mr. Baldwin to decide, and he has chosen, after a searching investigation, to put himself into my hands. I am confident that I can restore his sight, and to that end I obtained an interview with him. He knows all about me—more than you do, in all probability—and there is nothing underhand about it. I suppose Vanderpool has run to you with the story, but I care nothing for Vanderpool’s opinion. I violated professional etiquette, of course, by openly offering my services; but I’ve never cared a row of pins for such rules. They’re beneath me. Besides, I had everything to gain and little or nothing to lose. Your confounded meddling has played the deuce with my reputation, if it hasn’t done anything else. I saw a chance to get on top again and make all those fools who have been attacking me sing another tune. That’s all there is about it, and you haven’t a leg to stand on.”

“That sounds plausible enough, as it was meant to sound,” the detective remarked; “but—are you sure you never lost any money through Baldwin, or on any of his stocks?”

The question came out like the snap of a whip, and Nick’s eyes bored into the surgeon as he watched for its effect.

Apparently, however, it had none. Grantley did not drop his eyes for a moment. He returned the detective’s glance, eye for eye, and not a muscle of his face moved.