“I set it down in the hall, against the rear railing of the main stairway.”
“And you remained in Miss Sibella’s room until Sproot called you?”
“That is right.”
“Then the case was unguarded in the rear of the upper hall from about eleven until you left the house?”
“Yes. After I had taken leave of you gentlemen in the drawing-room I went up-stairs and got it.”
“And also made your adieus to Miss Sibella,” added Vance.
Von Blon raised his eyebrows with an air of gentle surprise.
“Naturally.”
“What amount of these drugs disappeared?” asked Markham.
“The four tubes of strychnine contained in all approximately three grains—three and one-third, to be exact. And there are twenty-five tablets of morphine in a Parke-Davis tube, making six and one-quarter grains.”