We have to look for the home of the Codex Borgia group of manuscripts.... It was a land inhabited by Aztec-speaking peoples; it was conterminous with the Zapotec territory, and it lay on the trade-route which led to the coast, and to the Maya-peopled district of Tabasco.... Indeed we also know that in this very region astronomic observation was highly developed, and the Morning Star (Venus) held in special veneration.[97] The upper horizontal band of the shield represents the celestial region. It recalls, with its feather fringe at the top and dots hanging from the lower section, the design around the so-called calendar stone collected by Humboldt, now in the Berlin Museum, and the upper encircling rim above the procession of figures of the so-called stone of Tizoc, as well as some of the upper bands in the murals of Mitla. If this is the celestial band, as we believe, it is quite appropriate to find on it the _tonatiuh_, or sun, represented in the rosette in the center. We find here two sets of four pointers each, radiating from the central disc of feathers, which surrounds a lozenge-shaped piece on which is a tiny pit below two horizontal lines. In the Real Palacio manuscript of Sahagun (estampa XII) are pictures of various symbols for heavenly bodies, one being a small disc with tiny dots, explained by Sahagun as being the sign for Venus. We have endeavored to identify this glyph with that of the symbol for turquois or jewel, or the sign for chalchihuitl. There is a slight resemblance, but we hold the opinion, as before stated, that it is the sign for the sun. We have been unable to find the exact counterpart of this combination either in the codices or in sculptures. [Illustration: PL. XXVIII SHIELD OF WOOD (FRAGMENT) WITH MOSAIC DECORATION MUSEUM OF THE AMERICAN INDIAN HEYE FOUNDATION, NEW YORK]