"illegal" department of Scotland Yard. If by chance you lost the keys of your safe, T. X. could supply you (so popular rumour ran) with a burglar who would open that safe in half an hour.
If there dwelt in England a notorious individual against whom the police could collect no scintilla of evidence to justify a prosecution, and if it was necessary for the good of the community that that person should be deported, it was T. X. who arrested the obnoxious person, hustled him into a cab and did not loose his hold upon his victim until he had landed him on the indignant shores of an otherwise friendly power.
It is very certain that when the minister of a tiny power which shall be nameless was suddenly recalled by his government and brought to trial in his native land for putting into circulation spurious bonds, it was somebody from the department which T. X. controlled, who burgled His Excellency's house, burnt the locks from his safe and secured the necessary incriminating evidence.
I say it is fairly certain and here I am merely voicing the opinion of very knowledgeable people