"They're not really quartz, but a synthetic substance the Alfings can make," he explained. "They can be adjusted to screen out any particular frequency of vibratory force desired. Thus the Alfings are able to apply the isolated radiation which the transmutation needs."

We passed through two more of the alchemic workshops, and then reentered the dark tunnels.

"Frey, will the dwarf king help us?" I asked in a low, anxious voice.

"I don't know," Frey said doubtfully. "He may, if he thinks there's danger of Loki's release. The Alfings fear Loki as greatly as we do."

Chapter IX

Loki's Prison

The drums ahead stopped throbbing. Frey and I were escorted into the greatest cavern, which was bright with the flickering light of many torches. Hundreds of Alfings had hastily gathered here. There were a few of their women, short-statured and hunched as the men, and not many children. Men, women and children all stared at us in heavy silence.

Upon a stone terrace at the end of the cavern stood a massive Alfing who wore a heavy gold collar studded with wonderful jewels. Bright, suspicious and fearful eyes looked at us out of his dark, heavy face. It was Andvar, the Alfing king. He listened to our guards' explanation, then spoke to me in a rumbling bass voice.

"Who are you, stranger? You do not look like any Aesir, yet you claim to be a friend of the lady Freya."

"I'm her betrothed," I declared, "and this is her kinsman Frey."