And then suddenly, the song of the pumps changed! The thumping and creaking lessened to an almost imperceptible amount as a tiny ring of oil appeared around the periphery of the bearing. The pump rose to a new level of activity, the parts whirling and plunging at a greater speed. Peetn thrilled in surprise. His interest increased ten-fold as Clark filled the cups on the other three pumps in turn. Each one's voice dropped from a shout to a whisper, and all chugged with more vigor under the relaxing influence of the lubricating oil. Peetn trembled all over as he noted that the protesting groans which had worried him so were gone. This was unbelievable! This stranger from Gamtl was indeed a friend! "Our work isn't done, Beany," said Clark, as he dumped what was left of the oil back into the drum and wiped his hands in the sand. "The really important part is yet to come. This is just preparing; now we've got to knock those rusty valves loose from their eye-teeth!" He screwed the barrel-cap back into place and, followed by Peetn whose animation was visibly increased over his usual lethargic, fatalistic state, he trod the stairs into the open air. The Earthman gave a preliminary tug or two at the valve-wheels, and then muttered under his breath. Peetn scowled inwardly. It was not good, tampering with the machines. Then the Martian went all weak and fluttery inside as the stranger picked up a short metal bar which had been lying in a dusty corner and began banging on the tops of the machines! He was upon Clark like a flash, and the tendons in the Earthman's arms cracked agonizingly as the Martian giant wrested the bar away from him in mid-blow. Clark relaxed as the tense tableau threatened to continue for a protracted length of time. "Look, Beany," he said pleadingly. "I'm only trying to jar the rust loose inside. Gimme back that thing and let me alone. I know what I'm doing." The Martian, of course, didn't understand a word, and he stood toying with the length of metal rod, his yellow eyes blank and inscrutable. Then with a sudden gesture, he handed it back to Clark and extended a tentacle. "He trusts me!" gasped the Earthman as he pumped the furry limb up and down enthusiastically.