He rose to his feet as he spoke.
“I think we'll pay a visit to the Croft-Thornton Institute now, and see how Markfield has been getting along with his examination. We may as well have a check, before we begin to speculate too freely.”
They found Markfield in his laboratory, and Sir Clinton came to business at once.
“We came over to see how you were getting on with that poison business, Dr. Markfield. Can you give us any news?”
Markfield indicated a notebook on his desk.
“I've got it out, I think. It's all there; but I haven't had time to write a proper report on it yet. It was——”
“Hyoscine?” Sir Clinton interrupted.
Markfield stared at him with evident appreciation.
“You're quite right,” he confirmed, with some surprise. “I suppose you've got private information.”
The Chief Constable evaded the point.