terrified dark eyes stared up at him out of a pale, heart-shaped
face. Then with a sob the girl wrenched free, ran out of the door and
was gone.

* * * * *

He did not follow, but instead carefully locked the door and placed a
chair against it. Things had been moving too rapidly for him to feel
sure he was safe even now. Opening his left hand, he gazed down at a
bit of crumpled yellow paper he was holding there. That much he had
saved of the message from his long dead grandfather when the murderer
grabbed the folded paper from the buffet table and fled.

It proved to be the bottom third of a sheet of heavy paper, and on it
was drawn a piece of a map, showing a large semi-circle, which might
have been a lake, and leading off from it were what might be a number
of crooked canals. At the end of one of these was an "X" and the word
"Here."

Below the sketch were some words that had not been torn off. He read
them with growing amazement. "... aves of Titan. I swear this to be the
true and correct place of concealment of ... may he who comes to possess
it do much good and penance, for it is drenched in blood and ... Captain
Orion Halkon."

Penrun sat for a long time in thought. Titan, the sixth moon of
Saturn! Nightmare of killing heat, iron cold, and monstrous spiders!
How many men had died trying to explore it! And who knew it better
than Penrun himself, the only one who had ever escaped from that
hellish cavern of the Living Dead? Old Halkon had hidden his treasure
well indeed.

Penrun had never found the Caves. Legend described them as the one
safe place on the satellite where a man might live without danger of
being attacked by the spiders because the Caves were too cold for
them.

Penrun doubted if there was any place that would be safe from the
monstrous insects.

At any rate old Halkon had hidden his treasure there, and that part of
the map that Penrun had thought was a lake was apparently the main
cavern, and the canals, side passages. Old Halkon believed that he had
hidden his treasure well, but he could not foresee just how well. Two
thirds of the map, showing the location of the entrance to the Caves,
had been taken by the murderer of the Martian, Lozzo. The remaining
third, which showed the location of the treasure inside the Caves, was
in Penrun's possession.

The murderer could find the Caves, but not the treasure inside; and
Penrun could find the treasure inside, but