The man’s attire, too, commended him to the starved graces of his spare host. It was as characterless as it was possible for fabric to be, and considered with his meager physique and vacant physiognomy, was a fitting complement to both; an adjustment of component detail too consistent to have been the needless aspect it was designed to present.

With a voice in which the character had been trained away as surely as the charity from the opinions of the social élite, this descendant of Lecocq accosted his patron, and with business-like brevity indicated that he was already familiar with the situation as outlined by Robert, and if Mr. Raikes would consent to reply to a few questions it would facilitate matters.

His hearer indicated that he was entirely at the disposal of the detective.

With characteristic concentration, therefore, Gratz began:

“Do you suspect anybody in particular?”

“No.”

“That is singular,” commented Gratz. “May I ask why? Under such circumstances the mind generally proceeds in some unhappy direction.”

“Not in this instance,” returned Raikes. “Before I suspect any one, I must assign to him supernatural powers, almost. I will have to explain how it is possible for any one to enter this room, penetrate that recess, make the substitution, and retire, leaving the door in the same condition, precisely as left by me the night before.”

“That is the point,” replied Gratz. Then, after a moment’s reflection, he inquired: “Am I at liberty to nose around this room?”

“Help yourself,” answered Raikes.