Espérance paused a second to recover his breath; then he went on at a slower pace. The pursued had not discovered the pursuit; he trudged along steadily and sturdily, never once looking back. Thus the two men crossed the Trastavere, and each in turn, emerging from a gate in the wall of the Leonine City, passed out into the marshy country beyond. They had not gone very far, when Espérance saw Giovanni suddenly give a start; at the same time he heard a loud, harsh voice cry out: "In the name of Luigi Vampa, halt!"
Straining his eyes, Espérance finally succeeded in piercing the semi-darkness of the surroundings, and perceived a gigantic ruffian, who wore a black mask, standing in the centre of the road and presenting a pistol at the head of the man he had every reason to believe was Giovanni Massetti.