Corpus of Electronic Texts Edition
The Irish ordeals, Cormac's adventure in the Land of Promise, and the decision as to Cormac's sword (Author: Unknown)

section 34

Then he sees another fortress, vast and royal, and another wall of bronze around it. There were four houses therein. He entered the fortress. He sees the vast palace with its beams of bronze, its wattling of silver, and its thatch of the wings of white birds.