From the fact that this room lay directly over the small one occupied by Inez, in which was the wall cavity they had recently explored, they conceived the idea that the wall here might also be hollow. Pounding upon it, however, had no effect in determining this, for kiln-baked adobe is not resonant and it was impossible to discover from any surface indication whether there were eight feet of closely set blocks or less. Careful search for any sign of an opening proved futile.