Twilight trotted down the steps two at a time, finally emerging in the basement hallway. This unseen corridor was the heart of the hospital; rooms of supplies and exotic medicines from all corners of the globe surrounded the nurse’s dormitory and the doctor’s suite. A small space for Rhyme had been eked out in one of the closets; the filly was sitting at her tiny desk solving math problems out of a battered textbook. Twilight smiled—while the child barely had a grasp of simple math, she knew more about pony anatomy and diseases than most, having been raised in the hospital, and it had been no surprise when her cutie mark had been just like her mother’s.