Mistress and Maid by Dinah Mulock

While her anxious mistresses were thus talking her over the servant lay on her humble bed and slept. They knew she did, for they heard her heavy breathing through the thin partition wall. Whether, as Hilary suggested, she was too ignorant to notice the days of the week, or month, or, as Selina thought, too stupid to care for any thing beyond eating, drinking, and sleeping. Elizabeth manifested no anxiety about herself or her destiny.

She went about her work just as usual; a little quicker and readier, now she was becoming familiarized to it; but she said nothing. She was undoubtedly a girl of silent and undemonstrative nature.