They arose shakily, straddling their legs and worked their way across the ice that had been forming in the Gouffre Martel abyss for millennia. They climbed into a forest of stone saplings that were stalagmites and stalactites thrusting up from the jagged floor and down from the ceilings. The vibrations of every step loosened the huge stalactites; ponderous stone spears thundered down from overhead. At the edge of the forest, Foyle stopped, reached out and tugged. There was a clear metallic ring. He took Jisbella's hand and placed the long tapering cone of a stalagmite in it.