Beatrice came down from her room presently, dressed in quiet black. In her hand she carried not only the telegram but a letter she had taken from the dressing-table of the dead man.

The little group in the hall had by this time been augmented by the presence of Colonel Berrington; Stephen Richford had slipped off somewhere. Mark had not failed to notice the restlessness and agitation of his manner.

"I think I have got rid of everybody," Berrington said. "It has been a most distressing business, and I am afraid that there is worse to come. Dr. Andrews has just telephoned. He has seen Sir Charles's medical man, and they have decided that there must be an inquest. I don't suggest that anything is wrong, but there you are."

"I am not surprised," Beatrice said coldly, "I have been to my father's room looking over his papers. And I found a letter that puzzles me. It was written last night as the date shows, in the hotel, on hotel paper, and evidently delivered by hand, as the envelope proves. Look at this."

Colonel Berrington held out his hand for the envelope. He started slightly as he looked at the neat, clear handwriting. Something was evidently wrong here, Mark thought. The Colonel was a man of courage, as he very well knew, and yet his fingers trembled as he glanced interrogatively at Beatrice before he drew the letter from the envelope.

"Yes," Beatrice said; "I want you to read it. I brought it down on purpose."

"There does not seem to be much," Berrington said. "As there is no heading and signature, the letter may be intended for anybody."

"Only my father's name happens to be on the envelope," Beatrice said quietly. "Pray read it aloud."

Berrington proceeded to do so. There were only two or three lines in which the writer said that she must see the recipient of the letter without delay, and that it was of no use to try and keep out of the way. There was nothing more; no threat or sign of anger, nothing to signify that there was any feeling at all. And yet so much might have been concealed behind those simple lines. Berrington looked grave, and trembled as he handed the letter back to Beatrice.

"Clearly it is our duty to find out who wrote that letter," Mark observed. "It was written in the hotel, probably by somebody dining here last night. It is just possible that it was written by someone who was staying in the hotel. In that case we can easily ascertain the name of the writer."

"How is that possible?" Berrington demanded. He asked the question quite nervously. "In a place so large as this, with so many visitors continually going and coming——"

"There is a rigid rule here," Mark proceeded to explain. "Every guest, even if only passing a single night under the roof, has to sign the visitors' book. With this letter in my hand I can compare signatures. If there is no signature like this characteristic handwriting, then our task is no easy one. On the other hand, if there is——"

The speaker paused significantly. Berrington's agitation deepened. With all her distress and sorrow, Beatrice did not fail to notice it.

"Perhaps you will go down to the office and see at once, Mark," Beatrice suggested.

Ventmore went off obediently enough. Berrington stood watching him for a moment, then he turned to Beatrice and laid his hand gently on her arm.

"Believe me, this is not going to help anybody," he said in a low voice. "Unless I am greatly mistaken, I know who wrote that letter. What connection she had with your father and what the secret was between them I shall perhaps never know. But the lady who wrote that letter——"

"Ah," Beatrice cried, with a flash of sudden inspiration, "it was the grey lady, I am sure of it."

"You have guessed correctly," Berrington went on. "It was the person whom you have elected to call the grey lady. It was a great shock to me to recognize that handwriting. The secret is not wholly mine to tell, but for a long time I have been seeking the grey lady. I had not the remotest idea that she and Sir Charles had anything in common; little did I dream that she was here in this hotel last night. But whatever may be the meaning of this mystery, if there has been foul play here, the grey lady is quite innocent of it. Don't ask me to say any more, because I cannot, I dare not."

Beatrice nodded in sympathy. The brave, grave soldier by her side was terribly agitated; indeed Beatrice could not have recognized him as being capable of such a display of emotion.

"I am going to believe in you both," she said. "Probably the grey lady was the last person to see my father alive. She may have told him some terrible news; she may have given him the shock that killed him. But there was another who knew——"

"What do you mean by that?" Berrington asked.

"Nothing. I have said too much. That is quite between myself and—and could possibly have had nothing to do with my father's death. Oh, if only Mark had arrived five minutes sooner!"

Berrington knew exactly what was passing through Beatrice's mind.

"A great pity, indeed," he said quietly. "What a difference moments make in our lives. Still——"

"Still there is always the doubt," Beatrice whispered eagerly. A constant throng of people passed through the great hall where the death of Sir Charles was already forgotten. "I am living on the doubt, Colonel Berrington; am I or am I not married to Stephen Richford?"

"I could not say," Berrington replied. "I have very little knowledge of these matters. As far as I could see, the marriage ceremony was completed, the ring was placed on your finger, therefore——"

"Therefore you think that I am married," Beatrice said. She was twisting the gold badge of servitude on her finger nervously. "I am going to find out for certain. The service was not quite finished; there was no exhortation, there was no signing of the register. Surely I am free if it is my desire to be free. After what I found to-day——"

Again Beatrice paused as if aware of the fact that she was saying too much. There was a certain expression of relief on her face as she saw the figure of Mark approaching.

"Well, have you done anything?" she asked eagerly. "Have you made any great discovery?"

"I have only been partially successful," Mark said. "I have identified the writing with a signature of a guest in the visitors' book. The lady came only yesterday, as the date is opposite her writing. She came without a maid and with very little luggage, and she called herself Mrs. Beacon Light."

"Beacon Light," Beatrice said reflectively. "It sounds like a nom de plume; it suggests the kind of name a lady novelist would assume. Too singular to be real. And are you quite sure that the lady wrote that letter to my father?"

"I should say there is very little doubt about it," Mark replied. "The handwritings are identical. It seems that Mrs. Beacon Light stayed here last night and dined in the red salon. She had breakfast here very early, and then she paid her bill and departed. The clerk cannot say where she went, for her small amount of baggage was placed in a hansom and the driver was told to go in the first instance to Peter Robinson's. That is everything that I could ascertain."

There was no more to be said for the present, and very little to be done. A tall, stiff man, with an air of Scotland Yard indelibly impressed upon him, came presently, and asked to be allowed to see Sir Charles's suite of rooms. He had been waited upon at his office, he explained, by the deceased baronet's medical man, who had suggested the necessity for an inquest, which had been fixed upon for ten o'clock the following day. Under the circumstances the suite of rooms would be locked up and the seal of authority placed on them. The inspector was sincerely sorry to cause all this trouble and worry to Miss Darryll, but she would quite see that he was doing no more than his duty.

"But why all this fuss?" Stephen Richford demanded. He had come up at the same moment. Troubled and dazed as Beatrice was, she could not help noticing that Richford had been drinking. The thing was so unusual that it stood out all the more glaringly. "There's no occasion for an inquest. Dr. Oswin has told me more than once lately that Sir Charles was giving his heart a great deal too much to do. This thing has got to be prevented, I tell you."

"Very sorry, sir," the inspector said politely; "but it is already out of private hands. Both Dr. Oswin and Dr. Andrews have suggested an inquest; they have notified us, and, if they wished to change their minds now, I doubt if my chief would permit them."

Richford seemed to be on the point of some passionate outburst, but he checked himself. He laid his hand more or less familiarly on Beatrice's arm, and she could feel his fingers trembling.

"Very well," he said sulkily. "If you have made up your minds as to this course, I have no more to say. But there is nothing to gain by standing here all day. Beatrice, I have something to say to you."

"I am quite ready," Beatrice said. "I have also something to say to you. We will go on as far as my sitting-room. Please don't leave the hotel, Colonel Berrington; I may want you again."

The hard corners of Richford's mouth trembled, but he said nothing. He did not utter a word until the door of the sitting-room had closed upon Beatrice and himself. He motioned the girl to a chair, but she ignored the suggestion.

"It is a very awkward situation," Richford began. "As my wife——"

"I am glad you have come so quickly to the point," Beatrice said eagerly. "Am I your wife? I doubt it. I do not think I am your wife, because the ceremony was not quite completed and we did not sign the register. You know what my feelings have been all along; I have never made the slightest attempt to disguise them. If I had known that my father was dead—that he had died on the way to church, I should never have become Mrs. Stephen Richford. To save my father's good name I had consented to this sacrifice. My father is dead beyond the reach of trouble. If I had only known. If I had only known!"

The words came with a fierce whisper. They stung the listener as no outburst of contempt or scorn could. They told him clearly how the speaker loathed and despised him.

"Nobody did know," he sneered. "Nobody could possibly have known."

"That is not true," Beatrice cried. She had come a little closer to Richford; her cheeks were blazing with anger, her eyes flamed passionately. "It is a cowardly lie. There was one man who saw my father after his death, and I am going to prove the fact in a way that cannot possibly be disputed. One man was in my father's room after his death. That man saw my father lying there, and he crept away without giving the slightest alarm. You may sneer, you may say that such a thing is impossible, that the man I allude to would have nothing to gain by such a course; but as I said before, I am going to prove it. Look at this telegram I hold in my hand. It was sent before ten o'clock to-day to the person to whom it is addressed. It evidently relates to some Stock Exchange business. The address is quite clear; the time the telegram was delivered is quite clear, too; and by the side of my father's body I found the telegram, which could only have been dropped there by the party to whom it was addressed. So that party knew that my father was dead, and that party made no alarm. Why?"

"Why," Richford stammered. "Why, because,—well, you see it is quite possible to explain——"

"It is not," Beatrice cried. "The telegram is addressed to you. It was you who called on my father; you who found him dead. And in your agitation you dropped that message. Then you grasped the fact that if the marriage was postponed it would never take place, that I was in a position to defy you. You locked my father's door; you said nothing; you made up your mind to let the ceremony go on. That accounts for your agitation, for the fact that you have been drinking. Cowardly scoundrel, what have you to say to this!"

"What are you going to do?" Richford asked sullenly.

"Unless you release me here and now," Beatrice cried, "I swear by Heaven that I am going to tell the truth!"