On the many elevator trips she noted that although there appeared to be six floors from the outside of the building, there were only five on the elevator. She saw it as a mystery to be solved, and scheduled it in her day planner (this was back when she still had the thing) for Tuesday. 10 am. After rounds, before lunch. And left the afternoon open just in case. She didn't have a map of the hospital, so had to rely only on instinct.