concentrated gaze as on the night when the fate of Valerie hung on the lips of the professor of chemistry and pasteboard. Every now and then, with light and careful fingers, Monsieur Blurosset changes the position of some card or cards. Sometimes he throws himself back in his chair and thinks deeply. The expressionless mouth, which betrays no secrets, tells nothing of the nature of his thoughts. Sometimes he makes notes on a long slip of paper; rows of figures, and problems in algebra, over which he ponders long. By-and-by, for the first time, he looks up and listens.
His little apartment has two doors. One, which leads out on to the staircase; a second, which communicates with his bed-chamber. This door is open a very little, but enough to show that there is a feeble light burning within the chamber. It is in the direction of this door that the blue spectacles are fixed when Monsieur Blurosset suspends his calculations in order to listen; and it is to a sound within this room that he listens intently.
That sound is the laboured and heavy breathing of a man. The room is tenanted.
"Good," says Monsieur Blurosset, presently, "the respiration is certainly more regular. It is really a most wonderful case."
As he says this, he looks at his watch. "Five minutes past eleven—time for the dose," he mutters.
He goes to the little cabinet from which he took the drug he gave to Valerie, and busies himself with some bottles, from which he mixes a draught in a small medicine-glass; he holds it to the light, puts it to his lips, and then passes with it into the next room.
There is a sound as if the person to whom he gave the medicine made some faint resistance, but in a few minutes Monsieur Blurosset emerges from the room carrying the empty glass.
He reseats himself before the green table, and resumes his contemplation of the cards. Presently a bell rings. "So late," mutters Monsieur Blurosset; "it is most likely some one for me." He rises, sweeps the cards into one pack, and going over to the door of his bedroom, shuts its softly. When he has done so, he listens for a moment with his ear close to the woodwork. There is not a sound of the breathing within.
He has scarcely done so when the bell rings for the second time. He opens the door communicating with the staircase, and admits a visitor. The visitor is a woman, very plainly dressed, and thickly veiled.
"Monsieur Blurosset?" she says, inquiringly.
"The same, madame. Please enter, and be good enough to be seated." He hands her a chair at a little distance from the green table, and as far away as he can place it from the door of
