As the evening closed in the clouds that had been noticed by Heliot covered the whole heavens. There was no wind below; at the same time one must have been blowing aloft, for the vapours parted and disclosed the moon and then drifted over its face again, and through them it peered dimly, like an eye with cataract over it, or else became totally obscured. The men detailed for the expedition were assembled in the courtyard of the castle. They were not mounted--horses were unnecessary and inconvenient. The tramp might be heard and cause alarm. The _routiers_ remained in their ranks motionless till the word was given, and then silently they defiled out of the castle, through the street of Domme, and the town portcullis was raised to allow them to pass forth. Le Gros Guillem had boats on the river at his command. And the passage of the Dordogne was effected in the darkness successfully without attention being attracted on the opposite bank. The companions issued from the boats and drew up on the bank till the Captain gave the command to march, when they proceeded down the right bank of the river without speaking and without making any noise. Owing to the rainfall the way was muddy and the mud prevented their tramp from being audible. Shortly before the hour named by the castellan the entire party was near the Sarlat gate, concealed behind vineyard walls and bushes. The town that was menaced seemed to be buried in slumber and security. The only light discernible was the faint glow through the church window of S. Donat, where the sanctuary lamp burned. There was not even a light in the castle--which in the general darkness was indiscernible--only the mighty cliff into which it was built stood high overhead like a gigantic wave ready to fall and bury everything beneath it. The Captain picked out the men he had fixed on to accompany him and gave his instructions to the others in a whisper. As soon as the alarm-bell sounded in the castle they were to draw rapidly to the gate. Their comrades within would open, "and," said Guillem, "the town is yours--to do as you please therein." Then he advanced cautiously with his five men to the postern at the side and not to the main gate. This postern was small, it would admit but one man at a time. On reaching it Guillem scratched with the point of his sword, and the signal was answered at once--cautiously the door was unbarred and unlocked and the castellan appeared in it. The clouds had momentarily parted and the new moon gleamed forth and was reflected by the river. Guillem could perceive that this was the same man who had visited him at Domme. "The word?" "Le Peuch." "It is well, Le Peuch. How many?" he asked under his breath. "Myself and five," answered Guillem.