The remainder of the day and a portion of the evening were spent in concerting ways and means. They assured themselves of the Provost of the merchants of Paris, of the officers of the Gardes Francaises and the three thousand Swiss, of the Captains of the quarters and other notoriously factious persons who could be trusted as leaders. By ten o'clock at night all preparations were made and it was agreed that the ringing of the bell of Saint-Germain l'Auxerrois for matins was to be the signal for the massacre.
A gentleman of the Admiral's household taking his way homeward that night passed several men bearing sheaves of pikes upon their shoulders, and never suspected whom these weapons were to arm. He met several small companies of soldiers marching quietly, their weapons shouldered, their matches glowing, and still he suspected nothing, whilst in one quarter he stopped to watch a man whose behaviour seemed curious, and discovered that he was chalking a white cross upon the doors of certain houses.
Meeting soon afterwards another man with a bundle of weapons on his shoulder, the intrigued Huguenot gentleman asked him bluntly what he carried and whither he went.
“It is for the divertissement at the Louvre tonight,” he was answered.
But in the Louvre the Queen-Mother and the Catholic leaders, the labours of preparation ended, were snatching a brief rest. Between two and three o'clock in the morning Catherine and Anjou repaired again to the King's cabinet. They found him waiting there, his face haggard and his eyes fevered.
He had spent a part of the evening at billiards, and among the players had been La Rochefoucauld, of whom he was fond, and who had left him with a jest at eleven o'clock, little dreaming that it was for the last time.
The three of them crossed to the window overlooking the river. They opened it, and peered out fearfully. Even Catherine trembled now that the hour approached. The air was fresh and cool, swept clean by the stirring breeze of the dawn, whose first ghostly gleams were already in the sky. Suddenly, somewhere near at hand, a pistol cracked. The noise affected them oddly. The King fell into an ague and his teeth chattered audibly. Panic seized him.
“By the Blood, it shall not be! It shall not be!” he cried suddenly.
He looked at his mother and his brother and they looked at him; ghastly were the faces of all three, their eyes wide and staring with horror.
Charles swore in his terror that he would cancel all commands. And since Catherine and Anjou made no attempt to hinder him, he summoned an officer and bade him seek out the Duke of Guise at once and command him to stay his hand.