Murray Leinster,
The gadget had a ghost
(1952)
“ Coghlan took the magnet away. The wet place looked, somehow, as if it were about to dry permanently. Duval breathed stertoriously on the canvas cot."And now," said Ghalil blandly, "we do not need to believe it any more. We do not believe it, do we?""Of course not!" growled Mannard. "It's all nonsense!"Ghalil grinned. He brushed off his fingers."Undoubtedly," he said sedately, "M. Duval contrived it all. He will never admit it. He will always insist that one of us contrived it. We will all suspect each other, for always. ”
