Read it through once

As I spoke, rage sparkled in my eyes; the magistrate was intimidated. “You are mistaken,” said he. “I will exert myself, and if it is in my power to seize the monster, be assured that he shall suffer punishment proportionate to his crimes. But I fear, from what you have yourself described to be his properties, that this will prove impracticable; and thus, while every proper measure is pursued, you should make up your mind to disappointment.”