"It will be too late, then. Please understand, Mr. Macdonald, that I am making this call at Mr. Forbes's express wish. It is, as I have said, vitally important that I should get in touch with him without delay."

Scottish caution was not to be overcome by an appeal of that sort.

"I cannot go beyond what I have said," was the reply. "If you like to ask at his house--"

"O, ring off!" cried Theydon, who pictured the secretary as a lanky hollow-cheeked Scot, a model of discretion and trustworthiness, no doubt, but utterly unequal to a crisis demanding some measure of self-confident initiative. In reality, Mr. Macdonald was short and stout, and quite a jovial little man.

After an exasperating delay, he got into communication with the Forbes mansion in Fortescue Square.

"I'm Mr. Frank Theydon," he said, striving to speak unconcernedly. "Is Mr. Forbes in?"

"No, sir."

"Is that you, Tomlinson?"

"Yes, sir."

"Can you tell me where I can find Mr. Forbes at once?"

"Isn't he at his office, sir?"

"No. He will not be there till 12 o'clock."

A pause of indecision on Tomlinson's part. Then, a possible solution of the difficulty.

"Would you care to have a word with Miss Evelyn, sir?"

"O, yes, yes."

Theydon blurted out this emphatic acceptance of the butler's suggestion without a thought as to its possible consequences. He was racking his brain in a frenzy of uncertainty as to how he should frame his words when he heard quite clearly a woman's footsteps on the parquet flooring, and caught Evelyn Forbes's voice saying to Tomlinson: "How fortunate!

Mr. Theydon is the very person I wished to speak to, but I simply dared not ring him up."

The slight incident only provided Theydon with a new source of wonderment. Why should Evelyn Forbes want speech with him at that early hour? Perhaps she would explain. He could only hope so, and trust to luck in the choice of his own phrases.

"That you, Mr. Theydon?" came the girl's voice, sweet in its cadence yet ominously eager. "How nice of you to anticipate my unspoken thought! I have been horribly anxious ever since I read of that awful affair at Innesmore Mansions. That poor lady's flat is next door to yours, is it not?"

"Yes, but--"

"O, you cannot choke off a woman's curiosity quite so easily. You see, I happen to know that Mrs. Lester's sad death affects my father in some way, and I realize now that you two were just on pins and needles to get rid of me last night so that you might talk freely."

"Miss Forbes, I assure you--"

"Wait till I've finished, and you will not be under the necessity of telling me any polite fibs. You men are all alike. You think the giddy feminine brain is not fitted to cope with mysteries, and that is where you are utterly mistaken. A woman's intuition often peers deeper than a man's logic. I--"

"Do forgive me," broke in Theydon despairingly, "but I am really most anxious to know how and where I can get a word with your father. I would not be so rude as to interrupt you if I hadn't the best of excuses. Tell me where to find him now, and I promise to give you a call immediately afterward."

"He's at the Home Office."

"At the Home Office!"

Some hint of utter bewilderment in Theydon's tone must have reached the girl's alert ear.

"Ah! _Touche!_" she cried. "Now will you be good and tell me why Dad should receive a little ivory skull by this morning's post?"

Theydon knew that he paled. His very scalp tingled with an apprehension of some shadowy yet none the less affrighting evil. But he schooled himself to say, with a semblance of calm interest:

"What exactly do you mean, Miss Forbes?"

She laughed lightly. Theydon was so flurried that he did not realize the possibility of Evelyn Forbes being as quick to mask her real feelings as he himself was.

"Dad and I make a point of breakfasting together at nine o'clock every morning," she said. "We were talking about you, and he told me of the dreadful thing that happened to Mrs. Lester. I was reading the account of the tragedy in a newspaper, when I happened to glance at him. He was going through his letters, and I was just a trifle curious to know what was in a flat box which came by registered post. He opened it carelessly and something fell out and rolled across the table. I picked it up and saw that it was a small piece of ivory, carved with extraordinary skill to represent a skull. Indeed, it was so clever as to be decidedly repulsive. I was going to say something when I saw that the letter which was in the same box had alarmed him so greatly that, for a second or two, I thought he would faint. But he can be very strong and stern at times, and he recovered himself instantly, was quite vexed with me because I had examined the ivory skull, and forbade my going out until he had returned from the Home Office. Tomlinson and the other men have orders not to admit any one to the house, no matter on what pretext, and I'm sure the letter and its nasty little token are bound up in some way with Mrs. Lester's death. Won't you let me into the secret? I shan't scream or do anything foolish, but I do think I am entitled to know what you know if it affects my father."

A sudden change in the girl's voice warned Theydon of a restraint of which he had been unconscious hitherto. He tried to temporize, to whittle away her fears. That was a duty he owed to Forbes, who was clearly resolved not to take his daughter into his confidence--for the present, at any rate.

"I really fail to see why you should assume some connection between the crime which was committed here on Monday night and the arrival of a somewhat singular package at your house this morning," he said reassuringly.

"Like every other woman, I jump at conclusions," she answered. "Why should this crime, in particular, have worried my father? Unfortunately, the newspapers are full of such horrid things, yet he hardly ever pays them any attention. No, Mr. Theydon, I am not mistaken. He either knew Mrs. Lester, and was shocked at her death, or saw in it some personal menace. Then comes the letter, with its obvious threat, and I am ordered to remain at home, under a strong guard, while he hurries off to Whitehall. You have met my father, Mr. Theydon. Do you regard him as the sort of man who would rush off in a panic to consult the Home Secretary without very grave and weighty reasons?"

"But you can hardly be certain that a wretched crime in this comparatively insignificant quarter of London supplies the actual motive of Mr. Forbes's action," urged Theydon.

The girl stamped an impatient foot. He heard it distinctly.

"Of course I am certain," she cried. "Why won't you be candid? You know I am right--I can tell it from your voice, and your guarded way of talking--"

An inspiration came to Theydon's relief in that instant.

"Pardon the interruption," he said, "but I must point out that both of us are acting unwisely in discussing such matters over the telephone.

Really, neither must say another word, except this--when I have found your father I'll ask his permission to come and see you. Perhaps we three can arrange to meet somewhere for luncheon. That is absolutely the farthest limit to which I dare go at this moment."

"O, very well!"

The receiver was hung up in a temper, and the prompt ring-off jarred disagreeably in Theydon's ear. If he was puzzled before, he was thoroughly at sea now. But he took a bold course, and cared not a jot whether or not it was a prudent one.

The mere sound of Evelyn Forbes's voice had steeled his heart and conscience against the dictates of common sense. Let the detectives think what they might, the girl's father must be allowed to carry through his plans without let or hindrance.

"Miss Beale," said Theydon, gazing fixedly into the sorrow-laden eyes of the quiet little lady whom he found seated where he had left her, "I'm going to tell you something very important, very serious, something so far-reaching and momentous that neither you nor I can measure its effect. You heard the conversation on the telephone?"

"I heard what you were saying, but could not understand much of it,"

said his visitor in a scared way.

"I have been trying to communicate with Mr. Forbes, but his daughter tells me that the murder of your niece seems to have affected him in a manner which is incomprehensible to her, and even more so to me, though I am acquainted with facts which her father and I have purposely kept from her knowledge. Mr. Forbes has gone hurriedly to the Home Office. I suppose you know what that means? He is about to give the Home Secretary certain information, and it is not for you or me to interfere with his discretion. Now, if you tell the Scotland Yard people what you have told me, namely, that Mr. Forbes was the intermediary through whom Mrs.

Lester received the greater part of her income, he will be brought prominently into the inquiry. You see that, don't you?"

"Yes. I suppose that something of the sort must happen."

"Well, I want you to suppress that vital fact until we know more about this affair. It will not be for long. Each of us must tell our story without reservation at some future date--whether this afternoon, or tomorrow, or a week hence, I cannot say now. But I do ask you to keep your knowledge to yourself until I have had an opportunity of consulting Mr. Forbes. I undertake to tell you the exact position of matters without delay, and I accept all responsibility for my present advice."

"I know little of the world, Mr. Theydon," said Miss Beale, rising, and beginning to draw on her gloves, "but I shall be very greatly surprised if you are advising me to act otherwise than honorably. I shall certainly not utter a word about Mr. Forbes at Scotland Yard. When all is said and done, my statement to you was largely guesswork. You must remember that I have never seen Mr. Forbes, nor hardly ever heard his name except in connection with public matters in the Press. O, yes. I make that promise readily. I trust you implicitly!"