The rites of Eleusis were divided into what were called the Lesser and the Greater Mysteries. According to James Gardner, the Lesser Mysteries were celebrated in the spring (probably at the time of the vernal equinox) in the town of Agræ, and the Greater, in the fall (the time of the autumnal equinox) at Eleusis or Athens. It is supposed that the former were given annually and the latter every five years. The rituals of the Eleusinians were highly involved, and to understand them required a deep study of Greek mythology, which they interpreted in its esoteric light with the aid of their secret keys.

It is not then without reason that in the mysteries that obtain among the Greeks, lustrations hold the first place; as also the layer among the...