And, as Demeter and her story embodied themselves gradually in the Greek imagination, so these mysteries in which her worship found its chief expression, grew up little by little, growing always in close connexion with the modifications of the story, sometimes prompting them, at other times suggested by them. That they had a single special author is improbable, and a mere invention of the Greeks, ignorant of their real history and the general analogy of such matters. Here again, as in the story itself, the idea of development, of degrees, of a slow [122] and natural growth, impeded here, diverted there, is the illuminating thought which earlier critics lacked. "No tongue may speak of them," says the Homeric hymn; and the secret has certainly been kept. The antiquarian, dealing, letter by letter, with what is recorded of them, has left few certain data for the reflexion of the modern student of the Greek religion; and of this, its central solemnity, only a fragmentary picture can be made. It is probable that these mysteries developed the symbolical significance of the story of the descent into Hades, the coming of Demeter to Eleusis, the invention of Persephone. They may or may not have been the vehicle of a secret doctrine, but were certainly an artistic spectacle, giving, like the mysteries of the middle age, a dramatic representation of the sacred story,--perhaps a detailed performance, perhaps only such a conventional representation, as was afforded for instance by the medieval ceremonies of Palm Sunday; the whole, probably, centering in an image of Demeter--the work of Praxiteles or his school, in ivory and gold. There is no reason to suppose any specific difference between the observances of the Eleusinian festival and the accustomed usages of the Greek religion; nocturns, libations, quaint purifications, processions--are common incidents of all Greek worship; in all religious ceremonies there is an element of dramatic symbolism; and what we really do see, through those scattered notices, [123] are things which have their parallels in a later age, the whole being not altogether unlike a modern pilgrimage. The exposition of the sacred places--the threshing-floor of Triptolemus, the rocky seat on which Demeter had rested in her sorrow, the well of Callichorus--is not so strange, as it would seem, had it no modern illustration. The libations, at once a watering of the vines and a drink-offering to the dead--still needing men's services, waiting for purification perhaps, or thirsting, like Dante's Adam of Brescia, in their close homes--must, to almost all minds, have had a certain natural impressiveness; and a parallel has sometimes been drawn between this festival and All Souls' Day.