He was standing at the window, and his mind was filled, not with thoughts of any complications that had developed for his friend Harkness, but only of the adventures that lay ahead of them both. The Dark Moon!--they had reached it, indeed; but they had barely scratched the surface of that world of mystery and adventure. He was wild with eagerness to return--to see again that new world, blazing brightly beneath the sun; to see the valley of fires--and he had a score to settle with the tribe of ape-men, unless Harkness had finished them off while he, himself, lay unconscious.... Yes, there seemed little doubt of that; Walt would have paid the score for all of them.... He seemed actually back in that world to which his thoughts went winging across the depths of space. The buzz of a telephone recalled him. It was the hospital office, he found, when he answered. There was a message--would Mr. Bullard kindly receive it on the telautotype--lever number four, and dial fifteen-point-two--thanks.... And Chet depressed a key and adjusted the instrument that had been printing the newscast. The paper moved on beneath the glass, and the type-bars clicked more slowly now. From some distant station that might be anywhere on or above the earth, there was coming a message. The frequency of that sending current was changed at some central office; it was stepped down to suit the instrument beside him. And the type was spelling out words that made the watching man breathless and intent--until he tore off the paper and leaped for the call signal that would summon the nurse. Through her he would get his own clothes, his uniform, the triple star that showed his rating and his authority in every air-level of the world. That badge would have got him immediate attention on any landing field. Now, on the flat roof, with steady, gray eyes and a voice whose very quietness accentuated its imperative commands, Chet had the staff of the hospital hangars as alert as if their alarm had sounded a general ambulance call. * * * * * Straight into the sky a red beacon made a rigid column of light; a radio sender was crackling a warning and a demand for "clear air." From the forty level, a patrol ship that had caught the signal came corkscrewing down the red shaft to stand by for emergency work.... Chet called her commander from the cabin of Diane's ship. A word of thanks--Chet's number--and a dismissal of the craft. Then the white lights signaled "all clear" and the hold-down levers let go with a soft hiss--