Herland, Charlotte Perkins Gilman, 1915. "What do you suppose these lady Burbanks had done with their cats? By the most prolonged and careful selection and exclusion they had developed a race of cats that did not sing! That's a fact. The most those poor dumb brutes could do was make a kind of squeak when they were hungry or wanted the door open, and, of course, to purr, and make the various mother-noises to their kittens."