> Somewhere in the middle of last night, I woke up, and wondered,
> sleepily, why the back of my midriff was rumbling with a noise like a
> cat purr.  I could both hear and feel the vibration.  After thirty
> seconds or so, I had awakened enough to realize that the sound really
> was the cat purring; I was both hearing and feeling the sound because
> she was curled up against the small of my back, under the blankets.