inquiry agent

"Stobb has a matter that might be mentioned," said Carfax, glancing at the other inquiry agent.

The famous confidential inquiry agent tapped the table with his forefinger and proceeded impressively.

He has other mysteries and misfortunes to attend to, for he has left the law and entered the service of a private inquiry agent.

Mr. Jabez had not been an inquiry agent all these years without having acquired a habit of pricking up his ears.

It announced that Mr. Jabez Duck had embarked in business on his own account as a private inquiry agent.