Just a quick one today. I found this on Futility Closet's blog here. The original source was The Laws of Etiquette, by “A Gentleman,” 1836.
“Servants are a necessary evil. He who shall contrive to obviate their necessity, or remove their inconveniences, will render to human comfort a greater benefit than has yet been conferred by all the useful-knowledge societies of the age. They are domestic spies, who continually embarrass the intercourse of the members of a family, or possess themselves of private information that renders their presence hateful, and their absence dangerous. It is a rare thing to see persons who are not controlled by their servants. Theirs, too, is not the only kitchen cabinet which begins by serving and ends by ruling.”