Una betrayed none of her suspicions regarding David in her discussion of these matters. She had not seen him since that first meeting in the little portico adjoining his quarters in the palace, hence she was ignorant of the result of Raoul's experiment. Sajipona had come to her immediately after its conclusion and, judging by the quiet cheerfulness of her manner, she fancied everything had gone to her satisfaction. This was confirmed by the announcement of the festival that was shortly to take place. This festival, Una had been told, was to be the occasion for great rejoicing among the cave people. It was a sort of national day, a celebration that had not been held in many a long generation. It was intended to recall, she heard, the ancient feast of El Dorado, the Gilded Man, about which, of course, as it existed among the Chibchas before the period of the Spanish invasion, Una was familiar through the traditions as told by David and Leighton. What form this revival of the old ceremonies would take had not been explained. But it piqued her curiosity and, in spite of resentment and wounded pride, she cherished a secret hope that it would bring about a final understanding of David's position in regard to Sajipona and herself. She felt sure David would be at the festival, and she had an intuitive feeling as well that his presence would dispel the mystery that sundered them. She did not look for, nor did she consciously want a reconciliation. Bitterly she denied herself the possibility of one. But she wished to know definitely, and to its full extent, David's faithlessness to her. After she had learned this, they could not start on their homeward journey too quickly. Still absorbed in these reflections, Una and her companions, under Narva's lead, entered the great court of the palace. Una, of course, had grown familiar with the strange features to be found in this hall of marvels; but the others, entering it for the first time, were amazed at what they saw there. In Leighton this feeling of wonder reached its highest pitch. The shattering of one scientific belief after another that he had experienced ever since entering the cave left him, it is true, somewhat callous to new impressions. But this apathy, if it can be called that, melted away as he stood beneath the great white dome that soared in flashing lines above them. Looking up at the huge ball of fire suspended just beyond the apex of this dome, for a moment he remained speechless. Then, turning to his companions, he voiced the ecstasy that comes with some unexpected, epoch-making discovery. "Do you know what that is?" he demanded.