“No, I’m not trying to interest you in her, only trying to explain her. There was another reason for her remaining where she did so long after all residents had left the block. She had a business.”

“Oh!”

“She embroidered monograms for fine ladies.”

“She did? But you needn’t look at me like that. She never embroidered any for me.”

“No? She did first-class work. I saw some of it. Miss Strange, if I could get you into that house for ten minutes—not to see her but to pick up the loose intangible thread which I am sure is floating around in it somewhere—wouldn’t you go?”

Violet slowly rose—a movement which he followed to the letter.

“Must I express in words the limit I have set for myself in our affair?” she asked. “When, for reasons I have never thought myself called upon to explain, I consented to help you a little now and then with some matter where a woman’s tact and knowledge of the social world might tell without offence to herself or others, I never thought it would be necessary for me to state that temptation must stop with such cases, or that I should not be asked to touch the sordid or the bloody. But it seems I was mistaken, and that I must stoop to be explicit. The woman who was killed on Tuesday might have interested me greatly as an embroiderer, but as a victim, not at all. What do you see in me, or miss in me, that you should drag me into an atmosphere of low-down crime?”

“Nothing, Miss Strange. You are by nature, as well as by breeding, very far removed from everything of the kind. But you will allow me to suggest that no crime is low-down which makes imperative demand upon the intellect and intuitive sense of its investigator. Only the most delicate touch can feel and hold the thread I’ve just spoken of, and you have the most delicate touch I know.”

“Do not attempt to flatter me. I have no fancy for handling befouled spider webs. Besides, if I had—if such elusive filaments fascinated me—how could I, well-known in person and name, enter upon such a scene without prejudice to our mutual compact?”

“Miss Strange”—she had reseated herself, but so far he had failed to follow her example (an ignoring of the subtle hint that her interest might yet be caught, which seemed to annoy her a trifle), “I should not even have suggested such a possibility had I not seen a way of introducing you there without risk to your position or mine. Among the boxes piled upon Mrs. Doolittle’s table—boxes of finished work, most of them addressed and ready for delivery—was one on which could be seen the name of—shall I mention it?”