green. We have no litmus-paper, but, hark! here they come with the syrup of violets."
The doctor was right; steps were heard in the passage. M. d'Avrigny opened the door, and took from the hands of the femme-de-chambre a cup which contained two or three spoonfuls of the syrup; he then carefully closed the door.
"Look!" said he to the procureur du roi, whose heart beat so loudly that it might almost be heard; "here is in this cup some syrup of violets, and this decanter contains the remainder of the lemonade of which M. Noirtier and Barrois partook. If the lemonade be pure and inoffensive, the syrup will keep its color; if, on the contrary, the lemonade be poisonous, the syrup will become green. Look well at it!"
The doctor then slowly poured some drops of the lemonade from the decanter into the cup, and, in an instant, a kind of light cloudy sediment began to form at the bottom of the cup; this sediment first took a blue shade, then from the color of sapphire it passed to that of opal, and from opal to emerald. Arrived at this last hue, it changed no more. The result of the experiment left no doubt whatever on the mind.
"The unfortunate Barrois has been poisoned," said d'Avrigny, "and I will maintain this assertion before God and man."
Villefort said nothing, but he clasped his hands, opened his haggard eyes, and, overcome with his emotion, sank into a chair.
