"Look here," said Bullard, breaking a silence. "Did you or did you not swindle me with those papers?"

"An inadvertence on my part, if you please, Mr. Bullard."

"Oh, go to the devil! You can't blackmail me. Go and work your pa.s.sage, if you like."

The other took a step forward. "Do you think I had better see Mr.

Lancaster? I could explain to him that he is less guilty in the matter of Christopher's brother than he imagines himself to be. I could even prove--"

"Lancaster is unwell--"

"My disclosures might make him feel better--eh?"

Bullard felt himself being cornered. He reflected for a moment; then--"How are you going to satisfy me that the papers you say you hold are the originals?"

"I'm afraid you must take my word for it."

"Your word--ugh! Will you bring them here at nine o'clock to-night?"

"Will you bring 500 in five-pound notes?"

It seemed that they had reached a deadlock. Bullard was thinking furiously.

At last he spoke. "No; I will bring one hundred pounds, and I will tell you how you may earn--earn mind--the remaining four. If you accept the job--not a difficult one--you will give me the papers in exchange for the hundred."

"But--"

"Not another word. Take my offer or leave it." Bullard turned to his desk. "And don't dare to lie to me again. Also, ask yourself what chance your word would have against mine in a court of law?"

At the end of twenty seconds the other said quickly: "I will be here at nine," and turned towards the door.

"By the way," Bullard called over his shoulder, "you had better come prepared for a night journey. And, I say! as you go out now try to look as if you had been d.a.m.ned badly treated. Further, before you come back, do what you can to alter that face of yours."

The door closed; Bullard's expression relaxed. For the first time in his life he had been within an ace of admitting--to himself--defeat. But all was not lost, even if he accepted Marvel's story, which he was very far from doing, his intelligence revolting no less at the bare idea of Alan Craig's existence than at that of the young man's supporting it as a quay labourer. Furthermore, were it proved to him that Alan had actually come from the Arctic, he would still not despair. He would have to act at high speed, but he was used to crises. As to Mr. Marvel, well, that clever person was going to be made useful to begin with; afterwards....

Bullard broke away from the clutches of thought to attend to the more urgent letters. He had just finished when his colleague came in.

"Hullo, Lancaster," he cried cheerfully, "I fancied your doctor had commanded rest. Glad to see you all the same. As a matter of fact, I was coming to look you up shortly."

"Couldn't rest at home," returned Lancaster, seating himself at the fire. "I say, Bullard," he said abruptly, "you'll be good to my girl--won't you?"

Bullard's eyebrows went up, but his voice was kindly. "Do you doubt it, Lancaster?"

"N-no. But you can surely understand my feelings--my anxiety. She--she has been a good daughter."

Bullard nodded. "It won't be my fault," he said quietly, "if Doris regrets marrying me."

"Thank you, Bullard." As though ashamed of his emotion the older man immediately changed the subject. "Anything fresh this morning?"

The other smiled. "One moment." He got up, went to a cabinet and came back with a gla.s.s containing a little brandy. "The journey to the City has tired you. Drink up!"

"Thanks; you are thoughtful." Lancaster took a few sips, and went white.

"Bullard, have you something bad to tell me?"

"Finish your brandy. ... Well, it might have been worse. Steady! Don't get excited, or I shan't tell you."

After a moment--"Go on," said Lancaster.

"Marvel has come back from Canada."

"Ah! ... But I always feared he would. More money, I suppose?"

"Precisely. Only he brought a piece of news which I have so far refused to credit, though doubtless stranger things have happened. Pull yourself together. Marvel declares that, a fortnight ago, he saw Alan Craig in the flesh."

"Alan Craig!" Lancaster fell back in the big chair. "Thank G.o.d," he murmured, "thank G.o.d!" Tears rushed to his eyes.

"Better let me give you details, few as they are, before you give further thanks," Bullard said. "Bear in mind what manner of man Marvel is; also, that his story was part of a threat to extort money."

A minute later Lancaster was eagerly asking: "But don't you think it may be true, Bullard?"

"For the present," was the cool reply, "we are going to act as though it were true, as though the will were waste paper--not that I ever considered it as anything but a last resource, for its production would involve sundry unattractive formalities."

"And yet," said Lancaster uneasily, "you told me once of a man who had seen Alan die."

"Leave that out for the present. I shall deal with Flitch presently, and G.o.d help him if he has played a game of his own! Meantime, the one object in view must be the Green Box at Grey House."

"For Heaven's sake be cautious! You spoke of bribing the man Caw, but the more I have thought of it--"

"That's past. There is no time for delicate negotiations. If the box is still in the house, we must find and take it; if elsewhere, we must make other plans. But I'm pretty sure it has not gone to a bank or safe deposit. Christopher meant it to remain in the house, so that it should be part of his gift to Alan."

"Caw will be on the alert."

"He will not expect a second attempt all at once. Hang it, man, we must take risks! 600,000! I'm not going to let any chance slip." Bullard went over to his desk and picked up a cablegram. "The Iris mine is flooded again. That means at least a couple of thousand less for each of us this year."

Lancaster groaned helplessly. "Trouble upon trouble! But I cannot face another visit to Christopher's house--"

"Be easy. You shall be spared that. I think I had better tell you nothing for the present--except that I may take a run over to Paris within the next few days."

"Paris!"

"You can say I'm there if any one asks."

Lancaster drew his hand across his brow. "Sometimes," he said slowly, "I wish I were at peace--in jail."

"Don't be a fool! You'll feel differently when we open the Green Box."

The other shook his head. "There's another point that has worried me horribly. We have thought we were the only persons outside of Grey House who knew of the diamonds; but who was the person who took the box that night? Whoever he was he must have seen us and heard something of our talk."

"Yes," said Bullard, with a short laugh, "it seems very dreadful and mysterious, doesn't it?--especially as Caw recovered the diamonds so speedily. I've thought it out, Lancaster, and I've struck only one reasonable conclusion. There was no fourth person present that night. Caw was fooling us all the time. The cupboard is really a pa.s.sage to another room, made for old Christopher's convenience, no doubt. How's that?"