A blade of blinding white flame, seemingly as solid as a blade of metal, spurted for the length of a foot from the tool's tip. Arlok began cutting the plate with the flame, the blade shearing through the heavy metal as easily as a hot knife shears through butter. The sight brought a sudden surge of exultant hope to Gordon. He swiftly drew Leah away from the window, far enough to the side that their low-voiced conversation could not be heard from inside the work-room. "Leah, there is our one chance!" he explained excitedly. "That blue fiend _is_ vulnerable, and that flame-tool of his is the weapon to reach his vulnerability. Did you notice how careful he was to shield his other hand with a glove before he turned the tool on? He can be hurt by that blade of flame, and probably hurt badly." Leah nodded in quick understanding. "If I could lure him out of the room for just a moment, you could slip in through the window and get that flame-tool, Blair," she suggested eagerly. "That might work," Gordon agreed reluctantly. "But, Leah, don't run any more risks than you absolutely have to!" He picked up a small rock. "Here, take this with you. Open the door into the hall and attract Arlok's attention by throwing the rock at his precious apparatus. Then the minute he sees you, try to escape out through the hall again. He'll leave his work to follow you. When he returns to his work-room I'll be in there waiting for him. And I'll be waiting with a weapon that can stab through even that armor-plated hide of his!" They separated, Leah to enter the house, Gordon to return to the window. * * * * * Arlok was back over in front of the apparatus, fitting into place the piece of metal he had just cut. The flame-tool, its switch now turned off, was still on the work-bench. Gordon's heart pounded with excitement as he crouched there with his eyes fixed upon the closed hall door. The minutes seemed to drag interminably. Then suddenly Gordon's muscles tensed. The knob of the hall door had turned ever so slightly. Leah was at her post! The next moment the door was flung open with a violence that sent it slamming back against the wall. The slender figure of Leah stood framed in the opening, her dark eyes blazing as she flung one hand up to hurl her missile. Arlok whirled just as Leah threw the rock straight at the intricate Gate-opening apparatus. With the speed of thought the Xoranian flung his own body over to shield his fragile instruments. The rock thudded harmlessly against his metallic chest. Then Arlok's tentacle flung out like a striking cobra, its forked tip flaming blue and green fire as it focussed upon the open door. But Leah was already gone. Gordon heard her flying footsteps as she raced down the hall. Arlok promptly sped after her in swift pursuit.