he took to contain something valuable. Seeing that Lady Arabella was secretly following Adam, he was confirmed in this idea. His mind—such as it was—was fixed on her trying to steal, and he credited her at once with making use of this new opportunity.
In his walk, Adam went into the grounds of Castra Regis, and Oolanga saw her follow him with great secrecy. He feared to go closer, as now on both sides of him were enemies who might make discovery. When he realised that Lady Arabella was bound for the Castle, he devoted himself to following her with singleness of purpose. He therefore missed seeing that Adam branched off the track and returned to the high road.
That night Edgar Caswall had slept badly. The tragic occurrence of the day was on his mind, and he kept waking and thinking of it. After an early breakfast, he sat at the open window watching the kite and thinking of many things. From his room he could see all round the neighbourhood, but the two places that interested him most were Mercy Farm and Diana’s Grove. At first the movements about those spots were of a humble kind—those that belong to domestic service or agricultural needs—the opening of doors and windows, the sweeping and brushing, and generally the restoration of habitual order.
From his high window—whose height made it a screen from the observation of others—he saw the chain of watchers move into his own grounds, and then presently break up—Adam Salton going one way, and Lady Arabella, followed by the nigger, another. Then Oolanga disappeared amongst the trees; but Caswall could see that he was still watching. Lady Arabella, after looking around her, slipped in by the open door, and he could, of course, see her no longer.
Presently, however, he heard a light tap at his door, then the door opened slowly, and he could see the flash of Lady Arabella’s white dress through the opening.
CHAPTER XVI—A VISIT OF SYMPATHY
Caswall was genuinely surprised when he saw Lady Arabella, though he need not have been, after what had already occurred in the same way. The look of surprise on his face was so much greater than Lady Arabella had expected—though she thought she was prepared to meet anything that might occur—that she stood still, in sheer amazement. Cold-blooded as she was and ready for all social emergencies, she was nonplussed how to go on. She was plucky, however, and began to speak at once, although she had not the slightest idea what she was going to say.
“I came to offer you my very warm sympathy with the grief you have so lately experienced.”
“My grief? I’m afraid I must be very dull; but I really do not understand.”
Already she felt at a disadvantage, and hesitated.
“I mean about the old man who died so suddenly—your old…retainer.”
Caswall’s face relaxed something of its puzzled concentration.
“Oh, he was only a servant; and he had over-stayed his three-score and ten years by something like twenty years. He must have been ninety!”
“Still, as an old servant…”
Caswall’s words were not so cold as their inflection.
“I never interfere with servants. He was kept on here merely because he had been so long on the premises. I suppose the steward thought it might make him unpopular if the old fellow had been dismissed.”
How on earth was she to proceed on such a task as hers if this was the utmost geniality she could expect? So she at once tried another tack—this time a personal one.
“I am sorry I disturbed you. I am really not unconventional—though certainly no slave to convention. Still there are limits…it is bad enough to intrude in this way, and I do not know what you can say or think of the time selected, for the intrusion.”
After all, Edgar Caswall was a gentleman by custom and habit, so he rose to the occasion.
“I can only say, Lady Arabella, that you are always welcome at any time you may deign to honour my house with your presence.”
She smiled at him sweetly.
“Thank you so much. You do put one at ease. My breach of convention makes me glad rather than sorry. I feel that I can open my heart to you about anything.”
Forthwith she proceeded to tell him about Oolanga and his strange suspicions of her honesty. Caswall laughed and made her explain all the details. His final comment was enlightening.
“Let me give you a word of advice: If you have the slightest fault to find with that infernal nigger, shoot him at sight. A swelled-headed nigger, with a bee in his bonnet, is one of the worst difficulties in the world to deal with. So better make a clean job of it, and wipe him out at once!”
“But what about the law, Mr. Caswall?”
“Oh, the law doesn’t concern itself much about dead niggers. A few more or less do not matter. To my mind it’s rather a relief!”
“I’m afraid of you,” was her only comment, made with a sweet smile and in a soft voice.
“All right,” he said, “let us leave it at that. Anyhow, we shall be rid of one of them!”
“I don’t love niggers any more than you do,” she replied, “and I suppose one mustn’t be too particular where that sort of cleaning up is concerned.” Then she changed in voice and manner, and asked genially: “And now tell me, am I forgiven?”
“You are, dear lady—if there is anything to forgive.”
As he spoke, seeing that she had moved to go, he came to the door with her, and in the most natural way accompanied her downstairs. He passed through the hall with her and down the avenue. As he went back to the house, she smiled to herself.
“Well, that is all right. I don’t think the morning has been altogether thrown away.”
And she walked slowly back to Diana’s Grove.
Adam Salton followed the line of the Brow, and refreshed his memory as to the various localities. He got home to Lesser Hill just as Sir Nathaniel was beginning lunch. Mr. Salton had gone to Walsall to keep an early appointment; so he was all alone. When the meal was over—seeing in Adam’s face that he had something to speak about—he followed into the study and shut the door.
When the two men had lighted their pipes, Sir Nathaniel began.
“I have remembered an interesting fact about Diana’s Grove—there is, I have long understood, some strange mystery about that house. It may be of some interest, or it may be trivial, in such a tangled skein as we are trying to unravel.”
“Please tell me all you know’ or suspect. To begin, then, of what sort is the mystery—physical, mental, moral, historical, scientific, occult? Any kind of hint will help me.”
“Quite right. I shall try to tell you what I think; but I have not put my thoughts on the subject in sequence, so you must forgive me if due order is not observed in my narration. I suppose you have seen the house at Diana’s Grove?”
“The outside of it; but I have that in my mind’s eye, and I can fit into my memory whatever you may mention.”
“The house is very old—probably the first house of some sort that stood there was in the time of the Romans. This was probably renewed—perhaps
