“Poison, I think.” He used their medicinal emetics as a first-aid measure, but almost without waiting for effects, took the inert figure away.

Mr. Zendt, standing reflective among the group of stunned laboratory workers, suddenly confronted Toby.

“Did he—drink anything?”

“Y—er——”

Did he?

“I—no—yes, sir.”

“Water?”

“Y—yes, sir.”

“Did he get it himself—where? What glass did he use? A clean one?”

Under the fire of questions Roger saw Toby redden and then whiten, heard him stammer and try to evade.