As the Black Sailor had suggested, to set the local police on the scent would be sheer waste of time. No serious attempt to scour the heath could possibly be made before daylight next morning, by which the object of the search would be far away. They might find the tracks of his bicycle, but if he desired to elude pursuit all he would need would be to carry it for some distance over the heather. The Professor credited the man who had baffled the London police by the ingenuity of his murders with sufficient acumen to leave no tracks by which he could be followed. No, the police could not help him, if he were to escape the fate that threatened him, it must be by his own efforts.