The theatrical ballet is comparatively a modern institution, but its real origin is to be found in the customs of very early times. The antiquity of dancing as a means of expression is well known, of course, and concerted movements on the part of a number of dancers, which constitute the ballet in its simplest form, are recognised to have been a feature of religious ceremonial in the furthest historic eras. The evolutions of the Greek chorus occur at once to the mind, and there is evidence that among the Egyptians, Assyrians, and Phœnicians, the formal dance was a part of religious ritual. Representations occur, on early vases and other relics, of dancers revolving round a central person or object, standing for the sun, and it may reasonably be surmised that some such ceremonial occurred among the most primitive pagan peoples. Rites of this kind, indeed, form the theme of “Le Sacre du Printemps,” the most remarkable of the Russian dancers’ more recent performances, which may be regarded as a deliberate attempt at reversion to type. That provocative ballet is discussed elsewhere in the present volume, but it may be remarked in passing that M. Nijinsky, who is responsible for the “choreography” of it, has endeavoured to restore to that word something more of its original significance than its use in modern times, to describe the general planning and arrangement of a ballet, ordinarily confers. Choreography or orchesography amongst the Egyptians and the Greeks was the art of committing a dance to writing just as a musical composition is registered and preserved by means of musical notation. M. Nijinsky considers that music and the dance being closely allied and parallel arts--the one the poetry of sound, the other the poetry of motion--a ballet should be as much the work of one creative mind as a piece of orchestral music. The principle he has embodied in “Le Sacre du Printemps” is that the dancers shall execute only those gestures and movements pre-ordained by the “choreographist,” and in the particular manner and sequence directed by the latter. The polyphony of orchestral music is to be paralleled by the polykinesis, if such a phrase may be coined, of the ballet. Leaving this digression, one may ascribe the immediate parentage of the modern theatrical ballet to the Court Ballets of the sixteenth and seventeenth centuries, which in turn arose out of the mediæval mystery plays, pageants, and masques. Ballets were a favourite diversion of the French Court of the period, where they underwent a gradual refinement in style from the relative coarseness which at first distinguished them. The opera-ballet was the next stage of development; then, towards the end of the eighteenth century, singing was omitted, and the ballet attained a dignity of its own.