The suitcase wasn’t really black. It was a dark cordovan brown, made even darker by long usage, which had added oily stains to the well-used leather. But Thorn thought of it as the Black Suitcase simply because it was the perfect example of the proverbial Little Black Box—the box that Did Things. As a test question in an examination, the Little Black Box performs a useful function. The examiner draws a symbolic electronic circuit. Somewhere in the circuit, instead of drawing the component that is supposed to be there, he draws a Little Black Box. Then he defines the wave-form, voltage, and amperage entering the circuit and defines whatever is coming out. Question: What is in the Little Black Box?
Except in the simplest of cases, there is never an absolute answer. The question is counted as correct if the student puts into the Little Black Box a component or subcircuit which will produce the effect desired. The value of the answer depends on the simplicity and relative controllability of the component drawn in the place of the Little Black Box.
Sorensen’s Black Suitcase was still a problem to Thorn. He couldn’t quite figure out what was in it.
“Hotter’n Billy Blue Blazes!” Sorensen said as he put the Black Suitcase down on the gleaming white ground. He grinned a little, which dispelled for a moment his Angry Old Man expression, and said: “You ready to go, Mr. Thorn?”
“I’m ready any time you are,” Thorn said grumpily.
Sorensen looked at the NAC&M scientist sideways. “You don’t sound any happier’n I am, Mr. Thorn.”
Thorn looked at him and thought he could see that flash of odd humor in his light blue eyes. Thorn exhaled a heavy breath. “I’m no happier than you are to be out in this heat. Let’s get on with it.”
Sorensen’s chuckle sounded so out of place that Thorn was almost startled. “You know the difference between you and me, Mr. Thorn?” Sorensen asked. He didn’t wait for an answer. “You think this test is probably a waste of time. Me, on the other hand, I know it is.”
“Let’s get on with it,” Thorn repeated.
It took two hours to set up the equipment, in spite of the fact that a lot of the circuits had been prefabricated before the caravan had come out from Salt Lake City. But Richard Thorn wanted to make certain that all his data was both correct and recorded. Sorensen had nothing to do but watch. He had no hand in setting up the equipment. He had brought the Black Suitcase, and that was all he was going to be allowed to do.