“What’s this?”

“It’s the set of prints I took from the valet’s fingers,” the Inspector hastened to explain. “It corresponds to nothing I’ve found anywhere else. You can see it’s a whorl type on the thumb.”

Sir Clinton examined the print for a moment or two, then put it down.

“What about the box and the wrist-watch?” he asked.

Inspector Armadale’s face showed that here he was puzzled.

“There’s nothing on either of them—not a recent mark of any description. And yet the man who packed them up must have fingered both things.”

“With gloves on, evidently.”

“But why gloves?” the Inspector demanded.

“Why gloves?” Sir Clinton echoed, rather sarcastically. “To avoid leaving finger-prints, of course. That’s obvious.”

“But why avoid leaving finger-prints on a thing that you’re sending to a jeweller for repair?”