The heathens paid the same attention to the symbolic signification of this color. The Egyptians, for instance, decorated the head of their principal deity, Osiris, with a white tiara, and the priests wore robes of the whitest linen. In the school of Pythagoras, the sacred hymns were chanted by the disciples clothed in garments of white. The Druids gave white vestments to those of their initiates who had arrived at the ultimate degree, or that of perfection. And this was intended, according to their ritual, to teach the aspirant that none were admitted to that honor but such as were cleansed from all impurities, both of body and mind. In all the Mysteries and religions rites of the other nations of antiquity the same use of white garments was observed. Portal, in his "Treatise on Symbolic Colors," says that "white, the symbol of the divinity and of the priesthood, represents divine wisdom; applied to a young girl, it denotes virginity; to an accused person, innocence; to a judge, justice;" and he adds--what in reference to its use in Masonry will be peculiarly appropriate--that, "as a characteristic sign of purity, it exhibits a promise of hope after death." We see, therefore, the propriety of adopting this color in the masonic system as a symbol of purity. This symbolism pervades the whole of the ritual, from the lowest to the highest degree, wherever white vestments or white decorations are used. As to the material of the apron, this is imperatively required to be of lamb-skin. No other substance, such as linen, silk, or satin, could be substituted without entirely destroying the symbolism of the vestment. Now, the lamb has, as the ritual expresses it, "been, in all ages, deemed an emblem of innocence;" but more particularly in the Jewish and Christian churches has this symbolism been observed. Instances of this need hardly be cited. They abound throughout the Old Testament, where we learn that a lamb was selected by the Israelites for their sin and burnt offerings, and in the New, where the word _lamb_ is almost constantly employed as synonymous with innocence. "The paschal lamb," says Didron, "which was eaten by the Israelites on the night preceding their departure, is the type of that other divine Lamb, of whom Christians are to partake at Easter, in order thereby to free themselves from the bondage in which they are held by vice." The paschal lamb, a lamb bearing a cross, was, therefore, from an early period, depicted by the Christians as referring to Christ crucified, "that spotless Lamb of God, who was slain from the foundation of the world." The material, then, of the apron, unites with its color to give to the investiture of a mason the symbolic signification of purity. This, then, together with the fact which I have already shown, that the ceremony of investiture was common to all the ancient religious rites, will form another proof of the identity of origin between these and the masonic institution.