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