The familiar story that Herodotus tells of the message sent by the Scythians to Darius is significant. It will be recalled that the Scythian messenger brought the body of a bird, a mouse, and a frog, together with a bundle of five arrows. Interrogated as to the meaning of this strange gift, the messenger replied that his instructions were to present the objects and retire. Darius and his officers were much puzzled to interpret the message, Darius himself being disposed to regard it as an admission on the part of the Scythians that they conceded him lord of their territory, the land, water, and air; but one of the officers of the great king gave a different interpretation, which was presently accepted as the correct one. As he read the message it implied that unless the Persians could learn to fly through the air like birds, or to burrow through the earth like a mouse, or to dive through the water like a frog, they should not be able to escape the arrows of the Scythians. Miss Amelia B. Edwards, in her delightful book on Egypt, has hazarded some conjectures as to the exact way in which the bird and mouse and frog and arrows were presented to Darius. She believes that they were fastened to a piece of bark, or perhaps to a fragment of hide, in fixed position, so that they became virtually hieroglyphics. The question is interesting, but of no vital importance, since the exact manner of presentation would not in any way alter the intent, but would only bear upon the readiness of its interpretation. The real point of interest lies in the fact of this transmission of ideas by symbols, which constitutes the essence of the art of writing.