Malmsworth DeCastros. He was quite famous for certain geological discoveries on Titan at one time."

"I don't think so."

"You need not be sorry. The wretch was a murderer and a bad sport as well. I need not append that my brother and I were as unlike as night and day--though there is no night and day proper upon Avis Solis, of course. I imagine you would like to hear the story. Then you will undoubtedly understand how it is that I was so upset a moment ago by the sight of Avis Solis, and forgive me."

Mr. Wordsley nodded. A birdlike, snake-charmed nod.

* * * * *

"Avis Solis is a planet absolutely unique, at least in this galaxy. In addition to being a solitaire, its surface is almost solidly covered to a depth of several meters with light-gathering layers of crystal which give it the brilliant, astral glow that you saw just now. Its satellite suns contribute hardly any light at all. It contains ample oxygen in its atmosphere, but hardly any water, and so is practically barren. An ill-advised mineralogical expedition brought us to Avis Solis."

"Us?" Mr. Wordsley said.

"There were six of us, five men and a woman. A woman fine and loyal and beautiful, with the body of a consummate goddess and the face of a tolerant angel. I was astrological surveyor and party chief."

"I didn't know that you were once a surveyor."

"It was seventeen years ago, and none of your business besides."

"What happened then?"

"Briefly, we were prospecting for ragnite, which was in demand at the time. We had already given up hopes of finding one gram of that mineral, but decided to make a last foray before blasting off. My brother, Malmsworth, stayed at our base camp. Poor Jenny--that was her name--remained behind to care for Malmsworth's lame ankle."

Captain DeCastros was lost for several minutes in a bleak and desolate valley of introspection wherein Mr. Wordsley dared not intrude. There was a certain grandeur about his great, dark visage, his falciform nose and meaty jowls as he stood there. Mr. Wordsley began to fidget and clear his throat.

DeCastros glared at him. "They were gone when we returned. Gone, I tell you! She, to her death. Malmsworth--well, we found _him_ three hours later in the great rift which bisects the massive plateau that is the most outstanding feature of the regular surface of Avis Solis. At the end of this rift there is a natural cave that opens into the sheer wall of the plateau. Within it is a bottomless chasm. It was here that we found certain of Jenny's garments, but of Jenny, naturally, there was no trace. He had seen to that."

"Terrible," Mr. Wordsley said.

DeCastros smiled reminiscently. "He fled, but we caught him. He really had a lame ankle, you know."

The mice of apprehension scampered up and down Mr. Wordsley's spine. "You killed him." It was a statement of certainty.

"No, indeed. That would have been too easy. We left him there with one portable water-maker and all of that unpalatable but nourishing fungus which thrives upon Avis Solis that he could eat.