In spite of himself Cleek’s nerves gave an absolute jump, but being an adept in the art of dissimulation, he laughed lightly and gave Hamer a quizzical look.

“The Lady in Pink, eh?” he said cheerily. “You know more than your prayers, I’m afraid, Hamer. Now what in the world made you think he’d be calling on her last night, eh?”

“Well, sir, I can’t exactly say what, unless it was a sort of putting two and two together, sir. I’d seen him with her over Kingston way on my day off, only she wasn’t dressed in pink then, of course. And last night, a deal earlier in the evening, just about the time Lady Katharine and Miss Lorne was starting for Clavering Close it was, sir, I happens to go round back and slip into Mulberry Lane for a pull at my pipe on the sly master never letting any of the servants smoke in the grounds, and housekeeper objecting to pipes in the servants’ hall and just as I comes out, there she was a-standing in the shadow of the trees, and so close up to the wall that I nigh barged into her, sir.”

“Who? The Lady in Pink?”

“Yes, sir. Took her by surprise, coming out in that unexpected manner, and she just had time to throw a pink scarf she was wearing over her face and hurry away, sir, before I could so much as apologize. But quick as she was it didn’t prevent me a-seeing of her, sir, and recognizing her as the lady I’d seen Mr. Harry with on my day off, although, as I say, sir, she was dressed quite different last night. Looked to me as she was going to some sort of an evening affair: a dance or the theatre or something of that sort; for she didn’t have any hat on, and although she was wearing a long black cloak that reached almost to the ground, I could see when she made such a bolt to get out of sight that it was lined with ermine, and that, under it, she wore a rose-pink evening frock that she was holding up to keep from touching the ground.”

Cleek did not so much as turn a hair, although beneath his placid exterior something in the nature of a tumult was raging. And why not? For here, undoubtedly, was the pink gauze dress that had left the fragment on the nail head at Gleer Cottage last night; and here, too, was a garment which, being turned inside out, would become in truth an ermine cloak!

“Oho! Now I see how you came by the idea that Mr. Harry had gone out to meet her, Hamer,” he said with the utmost serenity. “Quite natural, quite, in the circumstances; only, as it turns out, you were mistaken. Mr. Harry spent the evening with me, and as we had the misfortune to miss the Pink Lady altogether, we didn’t see her at all last night, worse luck. But, I say, that’s letting you into something, isn’t it? Well, here’s half a crown to pay you to forget all about it and to keep your tongue behind your teeth. Understand?”

“Yes, sir. Thank you, sir. Much obliged, sir. Won’t breathe a word to a living soul.”

“Mind you don’t, or you’ll spoil sport and wait! Stop a moment! Got time to do something for me?”

“Oh, yes, indeed, sir. Plenty of time; no end of it this evening. Master says he’ll be up best part of the night reading, sir, and won’t need me at all to-night; so if it’s to go anywhere or to carry any message for you, sir, I’ve got hours at my disposal.”

“Thanks, but I shan’t require any more than a minute or two of your time. I’ll just scrawl a line on the leaf of my notebook, and ph, blow! Another fellow’s evening clothes! And, besides, when I come to think, it was in the pocket of the coat that confounded thief carried off. Slip into the library and get me a sheet of paper and a bit of pencil, will you? Look sharp!”

“Couldn’t do that, sir couldn’t get what you want from the library, I mean. Master’s in there reading, sir, and he’s locked the door and given orders that nobody’s to disturb him. But if a bit of typewriting paper will do, sir ”

“Yes, certainly. The very thing. Can you get me a sheet or two?”

“As much as you care to have, sir. It’s all in the hall cupboard along with the typewriter itself. Master had them taken there when he’d finished his book and let the typist go. I’ll get you some in an instant, sir.”

He hurried away forthwith and was back presently with half a dozen sheets of typewriting paper, a bit of pencil and an envelope, which latter he had included on the off-chance of its being needed.

Walking a few paces away, Cleek rested the paper against the wall, scribbled a few hasty words, sealed them up in the envelope, and then handed it over to Hamer.

“Here, take this thing to Miss Lorne. You’ll find her in the drawing-room,” he said, as he threw the remaining sheets which he had employed as a sort of writing pad upon one of the hall chairs. “You can attend to that litter afterward. Move sharp!”

He turned as he spoke, as if to go upstairs again, but the very instant Hamer had disappeared he went fleetly back to the chair, caught up one of the sheets of paper, folded it carefully, slid it into his pocket, and passing swiftly and soundlessly down the hall, opened the door and went out again into the night.

Hitherto all had been speculation, theory, guesswork, not irrefutable facts; hitherto all clues had been mere possibilities, never actual certainties. Now

The curious smile travelled up his cheek, slipped down again, and left his face as hard and as colourless as a mask of stone. He turned as he rounded the angle of the house and glanced back to where the windows of the dining-room cut two luminous rectangles in the fragrant, flower-scented darkness; then his eye travelled farther on, and dwelt a moment on the chinks of light that arrowed out from the curtained bay of the library.

“Poor old chap! Poor, dear old chap!” he said between shut teeth.

The tightly woven fabric of last night’s mystery had started to unravel. In one little corner a flaw had suddenly sprung into existence, and to-night the first loosened thread was in this man’s hands.

He set his back to the lighted windows and forged on through the darkness until the swerving path brought him to the little summerhouse where, earlier, he had first met Ailsa, and stepping in, threw himself into a rustic seat and bent forward with his elbows upon his knees and his face between his hands: a grim and silent figure in the loneliness and the darkness.

Five minutes passed six, seven and found him still sitting there, still communing with his own thoughts, though it was now nearing ten o’clock, and he had told Dollops to be at the wall angle to meet him at nine. But suddenly his attitude changed; his hands dropped, his head jerked upward, as a sleeping cat’s does when it hears a gnawing mouse, and he was on his feet, alert, eager, all alive, in a twinkling. Half a minute later Miss Lorne stepped from the grass on to the gravel and found him waiting for her in the arch of the summerhouse doorway.

“It is you at last, then, is it?” he said, reaching out to her through the darkness. “Take my hand and I will guide you if you cannot see the way clearly. I can’t risk striking a match.”

“It isn’t necessary; I know the way quite well,” she answered; but she took his hand all the same. “I hope I haven’t kept you waiting; I came as quickly as I could. Mrs. Raynor had fallen asleep over her novel while we were waiting for you and her son to finish your cigars and join us in the drawing-room, but Hamer coming in with your note awoke her and I could not get away so quickly as I desired.”

“Was Mrs. Raynor interested in the note, then? Did she show any desire to hear what it was about?” he questioned eagerly.

“Oh, no. She” colouring under cover of the darkness “she merely laughed, and said that it was no more than she should have expected, but she kept me talking so long that I nearly lost all patience, and your note did puzzle me, Mr. Cleek. Why was it so important that you should see me at once without Kathie knowing? Have you discovered anything fresh?”

“Such strange things indeed have happened, Miss Lorne, since this evening,” he returned quietly, “that I think I shall need your help in getting to the bottom of them. For one thing, it is now absolutely certain that the murderer of the Common keeper came into these grounds last night after he had committed the crime, and that when he gave Narkom and his men the slip the fellow came directly to this place unseen.”

“Mr. Cleek!”

“Sh-h-h! Not so loud, please. And don’t shake like that. Steady yourself, for there is something yet more startling to come. There is now positive proof, Miss Lorne, that Lady Katharine Fordham did leave this house last night and go to Gleer Cottage.”

“I won’t believe it!” she flung out loyally. But she had scarcely more than said it when his next words cut the ground from beneath her.

“A witness has turned up,” he said; “a witness who saw her there and spoke to her.”

“A witness? Dear God! Who?”

“Geoffrey Clavering!”

“Geoffrey Clavering? Geoffrey?”

“Yes. He and Lady Katharine had an interview in the ruin this evening, an interview which I overheard without either being aware of my presence. That is what sent Lady Katharine to bed with a bad headache just before dinner. Geoffrey Clavering accused her of murdering De Louvisan and acknowledged that it was he himself who placed the two lighted candles at the feet of the dead man’s body.”

She made no cry this time, no single sound. He knew that she was beyond doing so, that she was struck to the very heart, and he made haste to lessen her distress by telling her of Lady Katharine’s denial and of the whole circumstance as it happened. Then he told of his own discovery of the buried clothing, his overhearing the interview, the manner in which the lovers had parted, and, finally, of his own act in apprehending young Clavering and then accepting his parole and sending him off to London for the night.

“Why did you do that?” she questioned feebly, and was not satisfied even when he explained his motive. “I will not even take his word against Kathie’s, but I could have told you that he speaks the truth when he says that his stepmother’s interest in him is so great it is very likely that she did go out on the Common to look for him, and for the reason he gave. If he were her own son she could not think more of him. She absolutely idolizes him. He is not dearer to his father than he is to her; and if he does not return to Clavering Close to-night, be sure she will have the Common searched from end to end, and will go half out of her mind when she does not find him.”

Cleek took his chin between his thumb and forefinger and squeezed it hard. This was somewhat of a facer, he was obliged to confess.

“You rather take the wind out of my sails,” he said reflectively. “If the boy spoke the truth, if the stepmother really does care like that, why that eliminates her from the case altogether, and it isn’t worth while asking you to take the risk I alluded to in the note.”

“What risk?”

“A very considerable one for a young lady in your position, should you be seen. As I do not even know Lady Clavering by sight, I was going to ask you if you would mind prowling about the Common in company with me, that, if the lady put in an appearance, you might be able to identify her for me. But of course, if it is so very certain that she will join in the search for the boy, there’s no necessity for doing such a thing.”

“Pardon me, but I think, Mr. Cleek, there is more reason than ever,” she replied, “if only to ease her mind, you know. You might do that by telling her that Geoff was unexpectedly called to town and that you were on the way to the Close to tell them so. I don’t in the least mind taking the risk, as you call it, under those circumstances; it would be a charity to do so, for I know her ladyship, and Sir Philip will worry. Of course they will not think of worrying yet a while; it is much too early; and as Geoff came over here to see Kathie they will think he is remaining for the evening. But later, when it is past bedtime, when it is getting on toward twelve o’clock, they will be half out of their minds with anxiety. Oh, yes; I’ll go with you willingly, this minute if you like, in such a cause as that.”

“How loyal you are! What a woman you are! What a friend!” said Cleek admiringly. “Shall I tell you something? I have hope that one of those friends will be wholly cleared before another day comes; that something may happen to-night which will make Geoff Clavering the happiest of men and you and Lady Katharine almost beside yourselves with joy. No, don’t ask me what it is just yet a while. I have dreams and fancies and odd notions like other men sometimes; and I am a great believer in the theory of Loisette that a likeness of events acting upon a weary brain is apt to produce similar results in certain highly strung natures. But will you walk with me as far as the angle of the wall on the other side of the shrubbery, Miss Lorne? Dollops is waiting there for me. I have something of great importance for him to do to-night, and I think you will be interested in it. Will you come? Thank you! This way then, please, as quietly as you can.”

Taking her hand and keeping always on the grass and always in the dark, where the shadows of the trees lay between them and the lighted windows of the Grange, he led her on to something which even he had not foreseen and never for a moment guessed.

At the angle of the wall he stopped and began to whistle softly “Kathleen Mavourneen.” As upon another occasion, before he had completed the third bar, the wall door gaped open and flashed shut again and Dollops was in the dark, tree-crowded enclosure with him. It was a rather more excited Dollops than he had expected to find, however, for Cleek had no more than just begun to apologize for his lateness when the boy was on him like a pouncing cat and was cutting into his low-spoken words in a panting sort of whisper:

“For Gawd’s sake, gov’ner. Come quick, sir!” he said, as he laid a tense, nervous grip on Cleek’s arm. “’Nother door in the wall, sir. Higher up where them mulberry trees is thickest. Woman prowlin’ round, gov’ner. Been prowlin’ round this ten minutes past and been to that door and tried it three times a’ready. Woman in a pink dress, sir, and a long dark cloak reachin’ almost to the ground!”

“Margot!” said Cleek in an exultant whisper. “Margot at last, by George!”

Then, for the second time that night, he received a shock.

“If you mean that French Aparsh ‘skirt’ we run up against in the time of the Red Crawl, gov’ner,” interposed Dollops, “you’re backin’ the wrong horse. It aren’t her aren’t a bit like her, sir; no fear!”