K. questioned her, alternately soothing and probing.

“You are positive about it?”

“Absolutely. I have given him his medicines dozens of times.”

“You looked at the label?”

“I swear I did, K.”

“Who else had access to the medicine closet?”

“Carlotta Harrison carried the keys, of course. I was off duty from four to six. When Carlotta left the ward, the probationer would have them.”

“Have you reason to think that either one of these girls would wish you harm?”

“None whatever,” began Sidney vehemently; and then, checking herself,—“unless—but that's rather ridiculous.”

“What is ridiculous?”