Girdel now clambered to the edge of the roof, grasped the rope with both hands, and began to work his way across to Fanfaro.

"Quick, a knife!" cried the inspector.

Simon handed him his pocket-knife and the policeman began to saw the rope through. Luckily for Girdel, the work went very slow, for the knife was as dull as the rope was thick, and Simon, who only now began to remember that Girdel must not be killed at any price, loudly exclaimed:

"Stop, inspector, are you out of your senses?"

The policeman was no longer able to heed the warning. The knife had done its duty, the rope was cut!

Girdel did not fall to the pavement though. At the decisive moment Fanfaro bent far over the roof, and with superhuman strength held on to the rope on which Girdel was, at the same time crying to him:

"Attention, the rope is cut, take your teeth."

Girdel understood at once, and his mighty jaws held the rope firmly.

Fanfaro had bent far forward to hinder Girdel from being dashed against the wall, and kept in that position, until the athlete could work himself with his hands and teeth to the edge of the roof.

The roof was at length reached. Fanfaro swung his arms about Girdel, and the next minute they both disappeared behind a tall chimney!