appearances they were perfect and natural.

"It preserves," Lur settled back on his haunches and waved one front paw at the quiet water. "What goes into it remains as it was just at the moment of entrance."

"But if this is seven months old—"

"It may be seven years old," corrected Lur. "How can you tell when that branch first dipped into the lake? Yet the flowers do not fade even when withdrawn from the water. This is indeed a mystery!"

"Of which I would know more!" Varta dropped the turbi and started on around the edge of the lake.

Twice more they found similar evidence of preservation in flower or leaf, wherever it was covered by the opaline water.

The lake itself was a long and narrow slash with one end cutting into the desert of glass while the other wet the foot of the mountain. And it was there, on the slope of the mountain that they found the greatest wonder of all, Lur scenting it before they sighted the remains among the stones.

"Man made," he cautioned, "but very, very old."

And truly the wreckage they came upon must have been old, perhaps even older than Memphir. For the part which rested above the water was almost gone, rusty red stains on the rocks outlining where it had lain. But under water was a smooth silver hull, shining and untouched by the years. Varta laid her hand upon a ruddy scrap between two rocks and it became a drift of powdery dust. And yet—there a few feet below was strong metal!

Lur padded along the scrap of shore surveying the thing.

"It was a machine in which men traveled," his thoughts arose to her. "But they were not as the men of Memphir. Perhaps not even as the sons of Erb—"

"Not as the sons of Erb!" her astonishment broke into open speech.

Lur's neck twisted as he looked up at her. "Did the men of Erb, even in the old chronicles fight with weapons such as would make a desert of glass? There are other worlds than Erb, mayhap this strange thing was a sky ship from such a world. All things are possible by the Will of Asti."

Varta nodded. "All things are possible by the Will of Asti," she repeated. "But, Lur," her eyes were round with wonder, "perhaps it is Asti's Will which brought us here to find this 

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