Cullan's help, and staggered unsteadily across the hall to a pedestal on which was mounted a nest of coencentric crystal globes. He peered intently into the globes.
Light grew inside the coencentric crystals. Cullan knew he was witnessing some of the alien science of the Tuathans, an ancient science transcending the younger one of Earth.
"My thought is reaching through now to Lugh and Dagda," Goban whispered. "They will use the shape-sending to come here at once."
Suddenly, magically, two men appeared there in the death-littered hall beside them. Two tall Tuathan lords, one of them a giant.
The older man was Lugh, king of the Tuathar race, he whom the Celts of old had deemed greatest of gods—a man grave and gray with age, with somber, wrinkled face and piercing eyes. The other man, a huge, fierce-eyed giant, was burly Dagda, warrior-lord of the race.
Cullan knew that he was not really seeing the two Tuatha lords. These were but images of them, hurled across distance by the "shape-sending" science of Lugh, images that could see and speak and wield certain powers.
"What reason for this urgent call—" Lugh began to Goban, and then checked himself as he saw Brian Cullan. His face grew stem with wrath. "You have returned, outworlder? Did I not warn you the penalty was death i£ you violated my decree and came back into this world?"
"Lord Lugh, look at these dead!" boomed the startled voice of giant Dagda, who had glanced across the corpse-strewn hall.
Goban spoke hastily. "The Fomorians have been here! They have taken the princess Fand and slain all others here but myself."
Lugh's face stiffened, almost as though in dread, as he heard Goban's swift tale. He cried, "What of the Gateway mechanism?"
"I do not know but I fear they have taken it also," stammered Goban. "I was struck down here, and Cuchulain revived me when he came."
Lugh and Dagda—or their images—glided swiftly up the stair to the roof of the bubble palace. Cullan followed hastily with Goban.
He had been up here before. In the recess on this roof, he remembered, was situated that strange mechanism of otherworld science which could be used to open the Gateway to Earth at will, and of which Fand was guardian.
But the mechanism was gone. That wonderful device of spinning crystals had been lifted from its bed, which now gaped empty.
"The Gateway in the hands of Tethra's Fomorians!" whispered Lugh. "It is what we have always feared and guarded against."
"They cannot operate it without knowing its secret," pointed out big Dagda. "And only Fand, beside yourself, knows that secret."
"Aye, but they have Fand," Lugh said somberly. "And Tethra's craft and tortures will surely win it from her in time."
He brooded for a moment. Then he told Goban, "Come at once to our citadel in Thandara. Great things impend, for now I think our long struggle with the dark ones of the north is rushing toward its climax."
He added, looking sternly at Brian
