We have no further business with this young man." They walked on, but Pietro followed at a little distance.

Seeing this, Dr.Drayton turned back.
"Young man," he said, "do you see that policeman across the street ?" "Si, signore," answered Pietro.
"Then I advise you to go in a different direction, or I shall request him to follow you." Pietro's sallow face was pale with rage.

He felt angry enough to tear Phil to pieces, but his rage was unavailing.

He had a wholesome fear of the police, and the doctor's threat was effectual.

He turned away, though with reluctance, and Phil breathed more freely.