Since it was on Forest Avenue, a block from our house, I’d seen Sister Ursula many times before the night she turned up in class, but we never had spoken. She drove a rusted-out station wagon that was always crowded with elderly nuns who needed assistance getting in and out. Though St. Francis Church was only a few blocks away, that was too far to walk for any of them except Sister Ursula, her gait awkward but relentless. “You should go over there and introduce yourself someday,” Gail, my wife, suggested more than once. “Those old women have been left all alone.” Her suspicion was later confirmed by Sister Ursula herself. “They are waiting for us to die,” she confessed. “Impatient of how we clutch to our miserable existences.”“I’m sure you don’t mean that,” I said, an observation that was to become my mantra with her, and she, in turn, seemed to enjoy hearing me say it.She appeared in class that first night and settled herself at the very center of the seminar despite the fact that her name did not appear on my computer printout.