"It was a letter of mine, Mr. Holmes, an indiscreet letter written before my marriage -- a foolish letter, a letter of an impulsive, loving girl. I meant no harm, and yet he would have thought it criminal. Had he read that letter his confidence would have been for ever destroyed. It is years since I wrote it. I had thought that the whole matter was forgotten. Then at last I heard from this man, Lucas, that it had passed into his hands, and that he would lay it before my husband. I implored his mercy. He said that he would return my letter if I would bring him a certain document which he described in my husband's despatch-box. He had some spy in the office who had told him of its existence. He assured me that no harm could come to my husband. Put yourself in my position, Mr. Holmes! What was I to do?"
"Take your husband into your confidence."
"I could not, Mr. Holmes, I could not! On the one side seemed certain ruin; on the other, terrible as it seemed to take my husband's paper, still in a matter of politics I could not understand the consequences, while in a matter of love and trust they were only too clear to me. I did it, Mr. Holmes! I took an impression of his key; this man Lucas furnished a duplicate. I opened his despatch-box, took the paper, and conveyed it to Godolphin Street."
"What happened there, madam?"
"I tapped at the door as agreed. Lucas opened it. I followed him into his room, leaving the hall door ajar behind me, for I feared to be alone with the man. I remember that there was a woman outside as I entered. Our business was soon done. He had my letter on his desk; I handed him the document. He gave me the letter. At this instant there was a sound at the door. There were steps in the passage. Lucas quickly turned back the drugget, thrust the document into some hiding-place there, and covered it over.
"What happened after that is like some fearful dream. I have a vision of a dark, frantic face, of a woman's voice, which screamed in French, `My waiting is not in vain. At last, at last I have found you with her!' There was a savage struggle. I saw him with a chair in his hand, a knife gleamed in hers. I rushed from the horrible scene, ran from the house, and only next morning in the paper did I learn the dreadful result. That night I was happy, for I had my letter, and I had not seen yet what the future would bring.
"It was the next morning that I realized that I had only exchanged one trouble for another. My husband's anguish at the loss of his paper went to my heart. I could hardly prevent myself from there and then kneeling down at his feet and telling him what I had done. But that again would mean a confession of the past. I came to you that morning in order to understand the full enormity of my offence. From the instant that I grasped it my whole mind was turned to the one thought of getting back my husband's paper. It must still be where Lucas had placed it, for it was concealed before this dreadful woman entered the room. If it had not been for her coming, I should not have known where his hiding-place was. How was I to get into the room? For two days I watched the place, but the door was never left open. Last night I made a last attempt. What I did and how I succeeded, you have already learned. I brought the paper back with me, and thought of destroying it since I could see no way of returning it, without confessing my guilt to my husband. Heavens, I hear his step upon the stair!"