On the way his temper cooled as he thought of the details of the case.

What did she know?
What had she done?
Maybe she'd got hold of Carrie, who knows--or--or Drouet.

Perhaps she really had evidence, and was prepared to fell him as a man does another from secret ambush.

She was shrewd.

Why should she taunt him this way unless she had good grounds?
He began to wish that he had compromised in some way or other-that he had sent the money.