"I beg your pardon--and his," said Bullard gravely. "But I am not often 'had.' Now, look here, Caw; I have still nine hundred and ninety pounds here. They are yours, if you can tell me where the collection is at the present moment."

The topmost thought in Caw's mind then was that the brutes might have had the decency to have waited until his master was laid in the grave. He felt helpless, powerless. He could not doubt that Bullard was playing with him. And in view of the promise to his master he could do nothing to prevent the crime, the desecration as he felt it to be. He could do nothing but look on in silence while they searched, until they found--But stay! he might as well despoil the spoilers when he had the chance.

"I will take your money, sir," he said, in an odd voice. "Look in the bottom right-hand drawer in the writing table."

Bullard's eyebrows rose. Then he got up and, with his eyes on the servant, opened the empty drawer.

Caw was within an ace of dropping the salver. After a moment he carried it to a side table and set it down with a small crash. Turning, he looked searchingly round the room. His gaze stopped at the curtain; he thought he understood. They had had an accomplice outside! ... He seemed to glide across to Bullard, and Bullard found himself looking into the barrel of a stout revolver.

"Out o' the house, the pair o' ye," he ordered hoa.r.s.ely, "or, by G.o.d, I'll forget the holy dead!"

"But look here--"

"Not a word! Take your hats and go! You've got what you came for--"

"Listen, you madman!" Bullard held up a hand, the one with the notes in it.

"Thanks!" With a flash-like movement Caw nipped away the notes. "You've got to pay something!"

Springing round behind Bullard, he shoved the cold steel into the nape of his neck. "March! and you, too, Mr. Lancaster. Take your friend's hat!"

Ignoring his colleague's gaze, which had moved suggestively from himself to the fire-irons, Lancaster obeyed and made for the door.

"You'll be devilish sorry," began Bullard, beside himself--

"Another word, and you'll lose one ear--to begin with. March!"

Sullenly Bullard moved forward. Not until he was in the garden did he attempt speech, and then his voice was thick, though fairly under control.

"Well, my man," he said, "you've got yourself into a nasty hole. Robbery, with a revolver in your hand, is rather seriously regarded by the law.

But as you have acted on impulse and misapprehension, I am disposed to give you a chance. Restore those notes--"

"Looks like being a wet night," said Caw, and shut the outer door.

When he had made it fast he switched off the lights in the hall and went upstairs. In his master's room he wavered, and his eyes rested longingly on the decanters, for he was feeling the reaction. But he was a good servant still, and it would be "hardly the thing" to take a dram there and then. Yet he forgot the conventions of service when, a moment later, he sank upon a chair and bowed his head on his master's table, sick at heart, sore in pride. He had been so easily tricked! And yet what difference would it have made if they had walked out of the room with the Green Box in their possession? But he was very sure they would not have dared so greatly, unless, perhaps, with force of arms--in which case, despite all promises, he knew he would have resisted. It never occurred to Caw to doubt his master's sanity, but now he began to wonder what had possessed Mr. Craig in regard to the Green Box. Six hundred thousand pounds! He seemed to see his master seated at the table, calmly naming the stupendous sum--and in the same instant he realised that he himself was sitting in his master's place. He sprang up, and almost fell over the open drawer. He stooped to close it, straightened up with an exclamation, only to drop to his knees, staring, staring at--the Green Box! Suddenly he gave a short chuckle, rose, and made for the door in the back wall.

Ere he reached it, it opened. A girl came in.

He was taken aback, and she was first to speak.

"Would you mind shaking hands?" said she.

"Miss Handyside, was it you?" he cried, taking her hand with diffidence.

She nodded. "At least, I suppose so, for it all happened so quickly that I'm still in a state of wonder."

"It was splendid, miss! I shall never be able to thank you."

"I couldn't help doing it, though I'm not used to adventures. It was all done on an impulse."

"Woman's wit, miss, if you'll excuse my saying so."

"Well, I was in the dark in more senses than one, but the proceedings of those two gentlemen were so peculiar, to say the least of it, that I felt justified in playing the spy."

"When did you arrive on the scene, miss?" Caw enquired, removing his admiring glance. For several years he had adored the doctor's daughter--from a strictly artistic point of view, as he would have explained it--and undoubtedly Marjorie had her attractions, though it would be difficult to a.n.a.lyse and tabulate them. A Scot with more perception than descriptive powers would have called her bonny. To go into brief detail, she had nut-brown hair, eyes of unqualified grey, a complexion suggesting sea-air, splendid teeth in a humorously inclined mouth, and a nicely rounded chin. Very few people have beautiful noses; on the other hand, not the most beautiful nose will redeem an otherwise unattractive countenance, whereas an ordinary nondescript nose in a charming face simply becomes part of it. Marjorie's was nondescript, but did not turn up or droop excessively. Without being guilty of stoutness, she lacked the poorly nourished look of so many young women of the day.

"I must explain why I arrived at all," she said, in answer to Caw's question. "I came with a message from the doctor--he twisted his ankle in the dark--not seriously, but quite badly enough to prevent his coming along himself. Well, when I reached the door I noticed from a thread of light that it was not absolutely shut--"

"My fault, miss. I was just about to come along for the night when the ring came."

"Then I heard voices--faintly--but clearly enough for me to judge they were those of strangers, and I was going to go back when I heard a voice say 'Lancaster, we've got it first time!' I'm ashamed to say my curiosity was too much for me--"

"Thank G.o.d for female curiosity, miss, if you'll excuse my saying so."

She checked a laugh. "You know how quietly the door works, I switched off the light behind me and opened it slightly--all trembles, I a.s.sure you--and looked in. The younger man was lifting a greenish box from a drawer to the writing-table, and the other man seemed half-paralysed with nervousness." She proceeded to relate what the reader already knows up to the episode of the window. "Then, with my heart in my mouth, I opened the door wide and stole in. The faint light from the water guided me to the table, but I almost lost my way going back with the box. I think they did hear something, but I was in safety by the time they could have turned their light into the room. But now I had closed the door tight, and could hear no more except indistinct voices, among which I fancied I heard yours. You were talking angrily, I think. And after a while there was a silence, and I waited and waited until I could wait no longer. Is it true," she asked abruptly, "that there are sixty thousand pounds' worth--"

"Six hundred thousand pounds, miss."

"Oh! ... But why was it not in a safe place? And who were those men?

And what--"

"It will be necessary," said Caw, as one coming to a decision, "to tell you all about it, Miss Handyside. My master said I might trust you. It's too much," he added, "for me to carry alone. And if you think the doctor--"

"Goodness!" she exclaimed; "he'll be wondering what has come over me--and I've forgotten to give you his message! It was just to tell that he thought it was time you were leaving here for your new quarters."

"Very good, miss. I'll come now."

"But are you going to leave the box there?"

"Got to--master's orders."

"Extraordinary! It's locked, I suppose?"

"Yes, miss; and last night, or, rather, this morning, at 12:15 by the clock, I threw the key into the loch--master's orders."

"You are sure the diamonds are in it now?"

"I was the last to see them and shut them in--master's orders."

"Oh, I can't take in any more! Let us consult the doctor at once."

Presently they pa.s.sed out by the way the girl had entered, closing the door behind them. They were at the top of a narrow and rather steep staircase of many steps covered with rubber. Descending they were in a tunnel seven feet high and four in width, so long that in the distance the sides seemed to come together. Roof and walls were white; light was supplied from bulbs overhead. The atmosphere was fresh, though the means of ventilation were not visible. Here again they trod on rubber.

Christopher Craig had caused the tunnel to be constructed as soon as he realised the truth about his malady; but it was primarily the outcome of a joking remark by Handyside after a midnight summons in mid-winter. It should be said here that at first Handyside had demurred becoming his neighbour's physician, but growing friendship with the lonely man had gradually eliminated his scruples. The tunnel had been a costly undertaking, the more so owing to the hurrying of its construction, but Christopher would have told you that its existence had saved his life on more than one occasion. The secret of the doors, by the way, was known only to himself and Caw, Dr. Handyside and Marjorie.

CHAPTER VII