It was only after a decided effort that she tore herself away from the detectascope and knocked on Adele's door as if she had just come in for a visit.

Again she knocked, but still there was no answer.
Every minute something might be happening next door.

She hurried back to her post of observation.
One of the worst aspects of the use of cocaine, she knew, was the desire of the user to share his experience with some one else.

The passing on of the habit, which seemed to be one of the strongest desires of the drug fiend, made him even more dangerous to society than he would otherwise have been.

That thought gave Constance an idea.
She recalled also now having heard somewhere that it was a common characteristic of these poor creatures to have a passion for fast automobiling, to go on long rides, perhaps even without having the money to pay for them.