Sometimes, she would show him her extraordinary power of calculating by the sound of a person's voice, the exact position which that person occupied towards her in a room.

Selecting me as the victim, she would first provide herself with one of the nosegays always placed by her own hands at Oscar's bedside; and would then tell me to take up my position noiselessly in any part of the room that I pleased, and to say "Lucilla." The instant the words were out of my mouth, the nosegay flew from her hand, and hit me on the face.

She never once missed her aim, on any one of the occasions when this experiment was tried--and she never once flagged in her childish enjoyment of the exhibition of her own skill.
Nobody was allowed to pour out Oscar's medicine but herself.

She knew when the spoon into which it was to be measured was full, by the sound which the liquid made in falling into it.

When he was able to sit up in his bed, and when she was standing at the pillow-side, she could tell him how near his head was to hers, by the change which he produced, when he bent forward or when he drew back, in the action of the air on her face.
In the same way, she knew as well as he knew, when the sun was out and when it was behind a cloud--judging by the differing effect of the air, at such times, on her forehead and on her cheeks.
All the litter of little objects accumulating in a sick-room, she kept in perfect order on a system of her own.