8. The remarkable cylinder with the human couple and the serpent leads us to the consideration of a most important object in the ancient Babylonian or Chaldean religion--the Sacred Tree, the Tree of Life. That it was a very holy symbol is clear from its being so continually reproduced on cylinders and on sculptures. In this particular cylinder, rude as the design is, it bears an unmistakable likeness to a real tree--of some coniferous species, cypress or fir. But art soon took hold of it and began to load it with symmetrical embellishments, until it produced a tree of entirely conventional design, as shown by the following specimens, of which the first leans more to the palm, while the second seems rather of the coniferous type. (Figs. No. 63 and 65.) It is probable that such artificial trees, made up of boughs--perhaps of the palm and cypress--tied together and intertwined with ribbons (something like our Maypoles of old), were set up in the temples as reminders of the sacred symbol, and thus gave rise to the fixed type which remains invariable both in such Babylonian works of art as we possess and on the Assyrian sculptures, where the tree, or a portion of it, appears not only in the running ornaments on the walls but on seal cylinders and even in the embroidery on the robes of kings. In the latter case indeed, it is almost certain, from the belief in talismans which the Assyrians had inherited, along with the whole of their religion from the Chaldean mother country, that this ornament was selected not only as appropriate to the sacredness of the royal person, but as a consecration and protection. The holiness of the symbol is further evidenced by the kneeling posture of the animals which sometimes accompany it (see Fig. 22, page 67), and the attitude of adoration of the human figures, or winged spirits attending it, by the prevalence of the sacred number seven in its component parts, and by the fact that it is reproduced on a great many of those glazed earthenware coffins which are so plentiful at Warka (ancient Erech). This latter fact clearly shows that the tree-symbol not only meant life in general, life on earth, but a hope of life eternal, beyond the grave, or why should it have been given to the dead? These coffins at Warka belong, it is true, to a late period, some as late as a couple of hundred years after Christ, but the ancient traditions and their meaning had, beyond a doubt, been preserved. Another significant detail is that the cone is frequently seen in the hands of men or spirits, and always in a way connected with worship or auspicious protection; sometimes it is held to the king's nostrils by his attendant protecting spirits, (known by their wings); a gesture of unmistakable significancy, since in ancient languages "the breath of the nostrils" is synonymous with "the breath of life." [Illustration: 64.--WINGED SPIRITS BEFORE THE SACRED TREE. (Smith's "Chaldea.")]