Then suddenly, without any warning, Tournefort jumped down from his post of observation. Chauvelin uttered a brief:

"What the——- are you doing, citizen?"

"Rateau is going," replied Tournefort excitedly. "He drank a mug of wine at a draught and has picked up his bundle, ready to go."

Once more cowering in the dark angle of a doorway, the two men waited, their nerves on edge, for the reappearance of their quarry.

"I wish citizen Gourdon were here," whispered Tournefort. "In the darkness it is better to be three than two."

"I sent him back to the Station in the Rue Mouffetard," was Chauvelin's curt retort; "there to give notice that I might require a few armed men presently. But he should be somewhere about here by now, looking for us. Anyway, I have my whistle, and if—"

He said no more, for at that moment the door of the cabaret was opened from within and Rateau stepped out into the street, to the accompaniment of loud laughter and clapping of hands which came from the customers of the "Bon Copain."

This time he appeared neither in a hurry nor yet anxious. He did not pause in order to glance to right or left, but started to walk quite leisurely up the street. The two sleuth-hounds quietly followed him. Through the darkness they could only vaguely see his silhouette, with the great bundle under his arm. Whatever may have been Rateau's fears of being shadowed awhile ago, he certainly seemed free of them now. He sauntered along, whistling a tune, down the Montagne Ste. Genevieve to the Place Maubert, and thence straight towards the river.

Having reached the bank, he turned off to his left, sauntered past the Ecole de Medecine and went across the Petit Pont, then through the New Market, along the Quai des Orfevres. Here he made a halt, and for awhile looked over the embankment at the river and then round about him, as if in search of something. But presently he appeared to make up his mind, and continued his leisurely walk as far as the Pont Neuf, where he turned sharply off to his right, still whistling, Tournefort and Chauvelin hard upon his heels.

"That whistling is getting on my nerves," muttered Tournefort irritably; "and I haven't heard the ruffian's churchyard cough since he walked out of the 'Bon Copain.'"