ne of the counsellors, a middle-aged man with graying russet hair and large gray eyes set in a perfectly smooth countenance, stepped from the platform and grasped the two adventurers as the confusion in the square increased to an uproar.

"Come," he whispered, in excellent Cos; "I'll explain all to you in the quiet of my own apartments. I am Detis, a scientist, and my home is close by."

Gently he clung to them as the larger men forced their way between the milling groups of excited Europans. No one gave them much attention. All seemed to be overcome with grief. A terrible disaster, this loss of the golden sphere must be!

They were out of the square and in one of the broad streets. The fluted sides of the unpointed cones shone softly golden on all sides. Alike in every respect were these dwellings of the people of Europa, and strangely attractive in the light of the mother planet.

Not a word was spoken when they reached the abode of their guide. They entered an elaborate hall and were whisked upward in an automatic elevator. Detis ushered them into his apartment when they alighted. He smiled gravely at their looks of wonder as they cast eyes on the maze of apparatus before them. It was a laboratory rather than a living room in which they stood.

Detis led them to an adjoining room where he bid them be seated. They exchanged wondering glances as their host paced the floor vigorously before speaking further.

"Friends," he finally blurted, "I hope you'll excuse my emotion but the news you brought is a terrible blow to me as to all Europa. Carli, our prince, beloved son of Cardos, was commander of the ship you reported lost. We deeply mourn his loss."