Marcus can identify the glyph on the large bas relief statue in the south room as the personal symbol of one of the Vaati (aka Wind Dukes), because it is similar to the glyphs photographed earlier and identified for you by Professor Stanley. [See here; the Professor identified glyphs belonging to Icosiol and Zosiel]
This glyph (pictured below) obviously represents yet another Wind Duke, but Marcus can't translate the name. It is likely that Professor Stanley will be able to tell you more.
Further searching the chamber, Marcus notes one thing of interest: the bed-shaped stone slab emanates a thin layer of whirling air from its top surface. The force of the air would be strong enough allow a normal sized human to lie atop it and be suspended just above the slab's surface.
The statues are meaningless to Tividius, but he recognizes the gold symbol on the ebon egg as the personal device of Ogrémoch, a mythical elemental prince of evil. [Marcus already shared this information, but Dr. Alexander's separate knowledge check confirms its accuracy]
Brad's check of the stone basin discovers several small holes. From stains and a small amount of mold on the stone around the holes, it appears that water once flowed into the basin from the holes. This would seem to confirm that the basin was a sort of bathtub.
Eric doesn't notice anything following you down the corridor. The green gas cloud has entirely dissipated.
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