the back of his mind was taking shape again.
“-to ease the operation of the actuator, this disk, that is,” Fletcher continued, ignoring him. “Now, the disk may be turned clockwise or counterclockwise, screwed in or out on threads in either direction, pulled outwards, or pressed inwards and turned one way or the other into a locking position..
The Captain performed the various twisting and pressing movements as he described them, but with no effect. He increased the power on his foot and wrist magnets so as to hold himself more firmly against the hull, placed his gauntleted thumb and forefinger on the two rough spots and twisted even harder. His hand slipped, so that momentarily all of the pressure was on his thumb and one rough area. That half of the disk tilted inwards while the other side moved out. The Captain’s face became very red behind his visor.
….. or, of course, it might turn out to be a simple rocker switch,” he added.
Suddenly the large, circular hatch began to swing inwards, and the ship’s atmosphere rushed out through the opening seal. The fabric of the portable lock they had attached to the hull bellied outwards and the metal cylinder of its double seal drew away from them, allowing them to stand up inside a large, inflated hemisphere of transparent plastic. As they were watching the hatch move inwards and upwards to the ceiling of the ship’s lock chamber, a short loading ramp was slowly extruded. It curved downwards to stop at the position that would have corresponded to ground level had the ship been on the ground.
Murchison had arrived and had been watching them through the portable lock fabric. “The air that escaped was from the lock chamber, because the flow has already stopped. If I could measure the volume of that lock chamber and our own portable job, I could calculate the aliens’ atmospheric pressure requirements as well as analyze the constituent gases m coming in.”
“Obviously a boarding hatch,” said the Captain. “They should have a smaller, less complicated lock for space EVAs and-”
“No,” said Conway, quietly but very firmly. “These people would not go in for extravehicular activity in space. They would be terrified of losing themselves.”
Murchison looked at him without speaking, and the Captain said impatiently, “I don’t understand you, Doctor. Prilicla, was there any emotional response from the survivors when we opened the lock?”
“No, friend Fletcher,” the empath replied. “Friend Conway is emoting too strongly for the survivors to register with me.”
The Captain stared at Conway for a moment, then he said awkwardly, “Doctor, my specialty has been the study of extraterrestrial mechanisms, control systems and communication devices, and my wide experience in this area led to my appointment to the ambulance ship project. The reason why I was able to operate this lock mechanism so quickly was partly because of my expertise and partly through sheer luck. So there is no reason why you, Doctor, whose expertise lies in a different area, should feel irritated just because-”
“My apologies for interrupting, friend Fletcher,” said Prilicla timidly, “but he is not irritated. Friend Conway is feeling wonder, with great intensity.”
Murchison and the Captain were both staring at him. Neither asked the obvious question, but he answered it anyway: “What would make a blind race reach for the stars?”
It took several minutes to make the Captain see that Conway’s theory fitted all the facts as they knew them, but even then Fletcher was not completely convinced that the crew of the ship was blind. It was true that the rough areas on the vessel’s underside, particularly those in the area of the thrusters, would give a being possessing only the sense of touch a strong tactual warning of danger, and that the smaller rough areas placed at regular intervals around the rim were probably the coverings of the less dangerous altitude jets. The smallest and most numerous patches of what at first they had thought was corrosion could well be opening or maintenance instructions on access panels, written in an extraterrestrial equivalent of Braille.
The total absence of transparent material, specifically direct vision ports, also gave support to Conway’s theory, although it was not impossible that the ports were there but protected by movable metal panels. It was a very good theory, Fletcher admitted, but he preferred to believe that the ship’s crew saw in a different part of the electromagnetic spectrum, rather than were completely blind.