"Well, Mr. Garfield? It's really awfully good of you to trouble to come out to see me. I'm all excitement to know what you have to tell me about Mr. De Gex. He's gone yachting--as you perhaps know. Do sit down." As I did so she passed me the cigarettes, and took one herself. Then, when I had held the match for her and had lit my own, I said: "Well, Mrs. Cullerton, I really don't know how to commence. Somehow, I felt it my duty to come here to see you. I must admit that I have been manoeuvring for several days in order to get an introduction to you, and to obtain an opportunity of seeing you alone. And yet----" "Yes. I quite see that. I thought by your attitude in the Via Tornabuoni that you seemed very anxious to know me," and her lips relaxed into a pretty smile. "That is so. In order to--well, to warn you," I said very seriously. "Warn me!--of what, pray?" I hesitated. To be perfectly frank with her was, I saw, quite impossible. She might hear all I said and then inform De Gex. She was his friend. Or perhaps she would dismiss me and my story as pure invention. Hence I resolved to preserve my own secret concerning the Stretton Street Affair. Looking straight into her face, I said: "I'm here to warn you of a very grave personal danger." "You are really most alarming, Mr. Garfield," she said in suspicion. "In what danger am I?" "You are either in possession of some ugly fact concerning Mr. De Gex which he desires suppressed, or else you bar his way to some ambitious achievement." Her face changed, and she held her breath. Though it was only for a second I saw that what I had suggested was the truth. Her slim white hand twitched nervously upon her lap. "Some fact concerning Mr. De Gex!" she gasped in feigned surprise. "Who told you that!" she asked, her face blanching. "I have not been told. But I know it, Mrs. Cullerton," was my reply. "I know that, though De Gex is assisting your husband out of a financial difficulty and pretends to be your good friend, he views you as his bitter enemy--as a person whose lips must, at all hazards, be closed." "Really, Mr. Garfield, what you say is too extraordinary--too amazing! I don't understand you!" "I know it sounds most extraordinary," I said. "But first tell me if you know a certain Doctor Moroni, who lives in the Via Cavezzo?" "Certainly. The doctor attends Mr. De Gex and his family. I first met him in London, about a year ago. Mr. De Gex holds him in very high esteem." "Ah! Then you know the doctor." "Of course. When he was in London he several times came to our house in Fitzjohn's Avenue." "And your husband knows him?" I asked, looking her straight in the face. "Please tell me the truth," I urged. "No. Jack has never met him--not to my knowledge." I was silent for a few seconds. I had established a fact which I had all along suspected. "Then he called in the daytime, when your husband was in the City--eh?" "Yes."