“Harrison liked to gloat, did he?” inquired Bernard.
“It’s possible,” replied Miss Mount in a dry tone.
At this moment the expert appeared, to interrupt their conversation.
“By the way, Lieutenant—”
“Yes, Thorpe? Find anything?” asked Landis.
“Nothing at all on the armor. It’s been wiped clean and quite recently, I think. Dusting might account for that. The door’s a bit better. I found blurred prints of three small fingers on the far side of the jamb and a thumb on the near side. There are distinct, slightly larger finger-prints on the inside knob.”
“The ones on the knob were made by Miss Mount here,” Landis explained. “Have you got impressions of both sets?”
“Can’t get them very well. I’ll have to photograph them. I’ve dusted them all with powder, though.”
“Take an impression of Miss Mount’s finger-prints and check them with the ones on the knob. I want a clear impression or print of the others if you can get it, Thorpe!”
Miss Mount submitted, passively pressing her finger-tips on the expert’s inky pad and then on paper. Thorpe took the impressions to the end of the library, studied them and the door knob with a magnifying glass and came back to the fire.