Premise: The energetic young man had succeeded in making the lives of several Scotland Yard men unbearable to them, and the telephone girls at the Admiralty had learned to know and dread the familiar "Hullo!" He had spent three hours in Paris hustling the Prefecture, and had returned from there imbued with the idea, possibly inspired by a weary French official, that the true clue to the mystery was to be found in Ireland.

Hypothesis: The lives of several Scotland Yard men had been made incredibly difficult by the young man and they began to resent him.
Relation: neutral