A party of slaves, under the escort of overseers and in charge of a knight who had been with them at their work on the fortifications, were passing along the street on their way back to barracks. It was already dusk, and as Gervaise was going the same way as they were, he stood aside in a doorway to let them pass. He was on the point of stepping out to follow them, when he saw a man, who had been standing in the shadow of the wall, fall in with their ranks, and, as he walked engaged in an earnest conversation with one of the slaves. He kept beside him for a hundred yards or so, then passed something into the slave's hand, and turned abruptly down a side opening. There were but few people about, and in the growing darkness the action of the man passed unobserved by the overseers. Gervaise, thinking the occurrence a strange one, turned down the same lane as the man.