"The rationalistic philosophers tell us, Sergeant"—Vance became puckishly pedantic—"that there's a reason for everything, but that the finite mind is woefully restricted. The altered technic of our elusive culprit when dealing with Ada is one of the things that is obscure. But you've touched a vital point. If we could discover the reason for this reversal of our inconnu's homicidal tactics, I believe we'd be a lot forrader in our investigation."
Heath made no reply. He stood in the centre of the room running his eye over the various objects and pieces of furniture. Presently he stepped to the clothes-closet, pulled open the door, and turned on a pendant electric light just inside. As he stood gloomily peering at the closet's contents there was a sound of heavy footsteps in the hall and Snitkin appeared in the open door. Heath turned and, without giving his assistant time to speak, asked gruffly:
"How did you make out with those footprints?"
"Got all the dope here." Snitkin crossed to the Sergeant, and held out a long Manila envelope. "There wasn't no trouble in checking the measurements and cutting the patterns. But they're not going to be a hell of a lot of good, I'm thinking. There's ten million guys more or less in this country who coulda made 'em."
Heath had opened the envelope and drawn forth a thin white cardboard pattern which looked like an inner sole of a shoe.
"It wasn't no pigmy who made this print," he remarked.
"That's the catch in it," explained Snitkin. "The size don't mean nothing much, for it ain't a shoe-
