"But I presume," said Lupin, "that this was not the only thing you came for. What you are interested in seeing is the marks of the blood. Come with me, Ganimard: it's rather dark in here." They moved into the next room, which, though it overlooked the courtyard, was lighter; and Lupin held his piece of silk against the window-pane: "Look," he said, making room for Ganimard. The inspector gave a start of delight. The marks of the five fingers and the print of the palm were distinctly visible. The evidence was undeniable. The murderer had seized the stuff in his bloodstained hand, in the same hand that had stabbed Jenny Saphir, and tied the scarf round her neck. "And it is the print of a left hand," observed Lupin. "Hence my warning, which had nothing miraculous about it, you see. For, though I admit, friend of my youth, that you may look upon me as a superior intelligence, I won't have you treat me as a wizard." Ganimard had quickly pocketed the piece of silk. Lupin nodded his head in approval: "Quite right, old boy, it's for you. I'm so glad you're glad! And, you see, there was no trap about all this ... only the wish to oblige ... a service between friends, between pals.... And also, I confess, a little curiosity.... Yes, I wanted to examine this other piece of silk, the one the police had.... Don't be afraid: I'll give it back to you.... Just a second...." Lupin, with a careless movement, played with the tassel at the end of this half of the scarf, while Ganimard listened to him in spite of himself: "How ingenious these little bits of women's work are! Did you notice one detail in the maid's evidence? Jenny Saphir was very handy with her needle and used to make all her own hats and frocks. It is obvious that she made this scarf herself.... Besides, I noticed that from the first. I am naturally curious, as I have already told you, and I made a thorough examination of the piece of silk which you have just put in your pocket. Inside the tassel, I found a little sacred medal, which the poor girl had stitched into it to bring her luck. Touching, isn't it, Ganimard? A little medal of Our Lady of Good Succour." The inspector felt greatly puzzled and did not take his eyes off the other. And Lupin continued: "Then I said to myself, 'How interesting it would be to explore the other half of the scarf, the one which the police will find round the victim's neck!' For this other half, which I hold in my hands at last, is finished off in the same way ... so I shall be able to see if it has a hiding-place too and what's inside it.... But look, my friend, isn't it cleverly made? And so simple! All you have to do is to take a skein of red cord and braid it round a wooden cup, leaving a little recess, a little empty space in the middle, very small, of course, but large enough to hold a medal of a saint ... or anything.... A precious stone, for instance.... Such as a sapphire...."