THE SWAMP FOLDED THEM in. It is never truly dark on Venus, owing to the thick, diffusing atmosphere. There was enough light to show branching, muddy trails, great still pools choked with weeds, the spreading liha-trees with their huge pollen pods, everything dripping with the slow rain. MacIan could hear the thudding of that rain for miles around on the silent air; the sullen forerunner of the deluge. Fort and village were lost in sodden twilight. Lehn's boots squelched onward through the mud of a trail that rose gradually to a ridge of higher ground. When he reached the top, Lehn turned abruptly, his electro-gun seeming to materialize in his hand, and MacIan was startled by the bleak look of his pink young face.
"Stop right there," said Lehn quietly. "Keep your hands up. And don't speak until I'm finished."
He waited a second, with the rain drumming on his waterproof coverall, dripping from the ends of his fair mustache. The others were obedient, Bhak a great grinning hulk between the two slighter men. Lehn went on calmly.
"Someone has sold us out to the Nahali. That's how I know they won't attack until they get the help they're waiting for. I had to find out, if possible, what preparations they have made for destroying our electrical supply, which is our only vulnerable point. But I had a double purpose in calling this party. Can you guess what it is?"
MacIan could. Lehn continued:
"The traitor had his price; escape from the Legion, from Venus, through the swamp to Lhiva, where he can ship out on a tramp. His one problem was to get away from the fort without being seen, since all leaves have been temporarily cancelled."
Lehn's mist-grey eyes were icy. "I gave him that chance."
Bhak laughed, an empty, jarring roar. "See? That's what the Nahali girl said. She said, 'He can get what he needs, now. He'll get away before the rains, probably with a patrol; then our people can attack.' I know what he needed. Money! And I want it."
"Shut up!" Lehn's electro-gun gestured peremptorily. "I want the truth of this. Which one of you is the traitor?"
Thekla's pointed white teeth gleamed. "MacIan loves the Legion, sir. He couldn't be guilty."
Lehn's gaze crossed MacIan's briefly, and again the Scot had a fleeting glimpse of something softer beneath the new hardness. It was something that took him back across time to a day when he had been a green subaltern in the Terran Guards, and a hard-bitten, battle-tempered senior officer had filled the horizon for him.
It was the something that had made Lehn offer him a chance, when his trap was set and sprung. It was the something that was going to make Lehn harder on him now than on either Bhak or Thekla. It was hero-worship.
MacIan groaned inwardly. "Look here," he said. "We're in Nahali country. There may be trouble at any moment. Do you think this is the time for detective work? You may have caught the wrong men anyway. Better do your job of reconnoitering, and worry about the identity of the traitor back in the fort."
"You're not an officer now, MacIan!" snapped Lehn. "Speak up, and I want the truth. You, Thekla!"
Thekla's black eyes were bitter. "I'd as well be here as anywhere, since I can't be on Mars. How could I go back, with a hanging charge against me?"
"MacIan?" Lehn's grey gaze was leveled stiffly past his head. And MacIan was quivering suddenly with rage; rage against the life that had brought him where he was, against Lehn, who was the symbol of all he had thrown away.
"Think what you like," he whispered, "and be damned!"
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