According to Manilius, Mercury is inconstant, vivacious, and curious, and presides over the right leg. Called "the winged messenger" in Alan Leo's book What is a Horoscope?, Mercury represents the principles of mentality, thinking patterns, rationality, transport, reasoning, and communication. This follows from the planet being named after the Roman messenger god.
- Wikipedia (2005). Planets in Astrology (http://en.wikipedia.org/wiki/Planets_in_astrology). Retrieved March 2, 2005