"Oh!" Miss St. Leger's expression changed abruptly. No longer did she look puzzled, but keen and alert. "I am rather sorry for that. However, Duane will be able to answer that question for us."
Duane hesitated, looking across at the science mistress.
"Only once, Miss St. Leger. Miss Vacher sent a junior asking me to get a pipette out of the lab for her, as she wanted it for some private work she was doing in her room. I was—was feeling rather lazy, so another girl offered to fetch it for me."
"Who was the girl who fetched the pipette?"
"Kitty Despard."
Miss St. Leger nodded. "Ah yes, I remember. The girl from Australia, who came at the beginning of the term. When was this?"
"Just before dinner."
"How long was she gone?"
"Only a few minutes."
"She gave the key back to you on her return?"