From moonlitpriestess.com
Quarters
Another name for the four cardinal directions–north, east, south, & west. (See also: Watchtowers, the) Generally linked to the Elements in many Wiccan and Pagan traditions today.
The Watchtowers
Another name for the four elements in some traditions; earth, air, fire, water. Sometimes used in reference to the spirits of the four directions–north, east, south, west–regardless of Elemental association. May also be in reference to the Archangels Raphael, Michael, Gabriel, and Uriel in similar fashion. As the Watchtowers, the spirits serve as protection within a magickal working.