And the question now is--" "Who did it ?" interrupted Bryce.

"Precisely! Well--I'll say this much at once, Mitchington.

Whoever did it was either a big bungler--or damned clever! That's what I say!" "I don't understand you," said Mitchington.
"Plain enough--my meaning," replied Bryce, smiling.

"To finish anybody with that stuff is easy enough--but no poison is more easily detected.
It's an amateurish way of poisoning anybody--unless you can do it in such a fashion that no suspicion can attach you to.

And in this case it's here--whoever administered that poison to Collishaw must have been certain--absolutely certain, mind you!--that it was impossible for any one to find out that he'd done so.