I have never heard my black cat purr until this morning. This is where I found her and she was very content! (She moved when I came in the room but she had been asleep). So sweet.
So she can purr after all. I just told someone the other day "my black cat doesn't purr and she sleeps alone". Thanks for making a liar out of me, Layla! I finally figured out who Layla's human is. This explains why she lets my child cart her all over the house.