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The Great Dome On Mercury
by
“I’m through!” The call came at last from McDermott. “Me too!” Jim Holcomb hurled his final, futile tubes down at the blue figure of the Mars man. A moment’s hush held the trio. Then Jim flexed his great hands. “Well, these’ll take care of a couple more o’ them before I check in.”
“No you don’t,” Darl barked, his face a graven image. “Inside with you. The lock will hold ’em off.”
“Yeah? Look.”
Thomas swung in the direction Jim was pointing. Rising above the murk, something glinted in the pale light. On the furthest upright a clumped group of climbing savages were struggling to drag up one of the welding machines, a long black hose snaking from its cylindrical bulk.
“They’ll cut through the steel in fifteen minutes with that. The bloody bugger ain’t missin’ a trick.”
“Inside, I tell you.” Darl’s crisp tone of command brooked no denial. The three crowded into the cool recesses of the manmade aerie. Angus slammed the steel door shut. Even if by some miracle the Dome wall should be pierced and the air in the main vault dissipated into outer space, this air-tight compartment hung from the hemisphere’s roof would remain, a last refuge, till the atmosphere within had become poisonous through the Earthmen’s slow breathing. But the Martian had anticipated Darl’s final move. The oxy-hydrogen jet of the welding machine the dwarfs were hoisting would make short work of their final defense.
* * * * *
From the conning-tower above Ran-los called excitedly. Through all the long battle the Venusian had remained steadfast at the peri-telescope, scanning the vacant terrain outside, and the heavens. As Darl and Jim dashed for the stairs Mac ran after them, crying out, “What did he say, mon?”
“Space ship in sight,” Darl flung over his shoulder as he reached the upper landing.
“Praise be! Noo the haythan weel get his desairts!”
“Yeah, maybe–if it’s an Earth ship. But we won’t be here to see it.”
Jim’s red head was bending over the peri-telescope view-screen. “She’s still thirty thousand miles away. Give her a speed of fifteen per second–she’ll have to slow up to land, can’t make it under forty-five minutes. By then we’ll be in little pieces. It took me ten minutes to burn through the barrier when I rescued Darl, and it won’t take the Mercs any longer to get at us.”
Darl was very sober as he looked on with narrowed eyes. Against a background of velvet black, gold spangled, the slim space-traveler showed. The sun’s rays caught her, and she was a tiny silver fish in the boundless void.
“Luik ye, mon, luik ye!” Angus, fairly dancing with excitement, elbowed Darl aside. “She’s from Airth, richt enow!” At the nose of the oncoming flier a rapid succession of colored lights had flashed, the recognition signal that should give her safe access to the Dome. Again there was a coruscation of coded flashes. “She’s a battle cruiser, what’s mair!” the Scot exclaimed.
* * * * *
Darl sprang to the keyboard that manipulated the signal lights from the Dome’s roof. “No use,” he said, after a short while. “The Martian has cut off the current from the dynamos. I can’t warn the ship.” He made a hopeless gesture.
Jim looked at him wonderingly. “Warn ’em? What for? Even if we are all dead when she reaches here, at least she’ll clean up the Mercs, and retake the Dome for Earth.”
“Don’t you see it? When the Mars man has once blasted his way in here and disposed of us, he’ll be ready for the space ship. Her captain can’t suspect anything wrong. He must have left Earth at the time of the ultimatum, and would easily get here before any ship could be sent out from Mars. He’ll come on till he’s within range of the beam-thrower, and the Martian will aim, press the trigger and the Earth ship and her crew of a half a thousand brave lads will be star-dust.”