Not only are they forced to discover all that is known to a conspirator, but they must also suppose and test a great number of things before they hit upon the right one.

The conspirator is always thinking of his own safety, whereas the police is only on duty at certain hours.

Were it not for treachery and betrayals, nothing would be easier than to conspire successfully.

The conspirator has more mind concentrated upon himself than the police can bring to bear with all its vast facilities of action.

Finding themselves stopped short morally, as they might be physically by a door which they expected to find open being shut in their faces, Corentin and Peyrade saw they were tricked and misled, without knowing by whom.
"I assert," said the corporal of Arcis, in their ear, "that if the four young men slept here last night it must have been in the beds of their father and mother, and Mademoiselle de Cinq-Cygne, or those of the servants; or they must have spent the night in the park.