These two words, icigo and icicaille , both of which mean ici , and which belong, the first to the slang of the barriers, the second to the slang of the Temple, were flashes of light for Thénardier. By the icigo he recognized Brujon, who was a prowler of the barriers, by the icicaille he knew Babet, who, among his other trades, had been an old-clothes broker at the Temple.

The antique slang of the great century is no longer spoken except in the Temple, and Babet was really the only person who spoke it in all its purity. Had it not been for the icicaille , Thénardier would not have recognized him, for he had entirely changed his voice.