“Our stuff seems to be all there,” said Crane. “It looks as though someone else has discovered it also.”
“I don’t believe it,” said Seaton, their positions now reversed. “It’s altogether too rare.”
He scanned both bottles narrowly.
“I can tell by taking the densities,” he added, and ran up to the laboratory, returning with a Westphal balance in his hand. After testing both solutions he said slowly:
“Well, the mystery is solved. The large bottle has a specific gravity of 1.80, as it had when I prepared it; that in the vial reads only 1.41. Somebody has burglarized this safe and taken almost half of the solution, filling the vial up with colored water. The stuff is so strong that I probably never would have noticed the difference.”
“But who could it have been?”
“Search me! But it’s nothing to worry about now, anyway, because whoever it was is gone where he’ll never do it again. He’s taken the solution with him, too, so that nobody else can get it.”
“I wish I were sure of that, Dick. The man who tried to do the research work is undoubtedly gone—but who is back of him?”
“Nobody, probably. Who would want to be?”
“To borrow your own phrase, Dick, Scott ‘chirped it’ when he called you ‘Nobody Holme.’ For a man with your brains you have the least sense of anybody I know. You know that this thing is worth, as a power project alone, thousands of millions of dollars, and that there are dozens of big concerns who would cheerfully put us both out of the way for a thousandth of that amount. The question is not to find one concern who might be backing a thing like that, but to pick out the one who is backing it.”
After thinking deeply for a few moments he went on:
“The idea was taken from your demonstration in the Bureau, either by an eyewitness or by someone who heard about it afterward, probably the former. Even though it failed, one man saw the possibilities. Who was that man? Who was there?”
“Oh, a lot of the fellows were there. Scott, Smith, Penfield, DuQuesne, Roberts—quite a bunch of them. Let’s see—Scott hasn’t brains enough to do anything. Smith doesn’t know anything about anything except amines. Penfield is a pure scientist, who wouldn’t even quote an authority without asking permission. DuQuesne is … hmm … DuQuesne … he … I …”
“Yes. DuQuesne. I have heard of him. He’s the big black fellow, about your own size? He has the brains, the ability, and the inclination, has he not?”
“Well, I wouldn’t want to say that. I don’t know him very well, and personal dislike is no ground at all for suspicion, you know.”
“Enough to warrant investigation. Is there anyone else who might have reasoned it out as you did, and as DuQuesne possibly could?”
“Not that I remember. But we can count DuQuesne out, anyway, because he called me up this afternoon about some notes on gallium; so he is still in the Bureau. Besides, he wouldn’t let anybody else investigate it if he got it. He would do it himself, and I don’t think he would have blown himself up. I never did like him very well personally—he’s such a cold, inhuman son of a fish—but you’ve got to hand it to him for ability. He’s probably the best man in the world today on that kind of thing.”
“No, I do not think that we will count him out yet. He may have had nothing to do with it, but we will have him investigated nevertheless, and will guard against future visitors here.”
Turning to the telephone, he called the private number of a well-known detective.
“Prescott? Crane speaking. Sorry to get you out of bed, but I should like to have a complete report upon Dr. Marc C. DuQuesne, of the Rare Metals Laboratory, as soon as possible. Every detail for the last two weeks, every move and every thought if possible. Please keep a good man on him until further notice … I wish you would send two or three guards out here right away, tonight; men you can trust and who will stay awake … Thanks. Good night.”
V
Direct Action
Seaton and Crane spent some time developing the object-compass. Crane made a number of these instruments, mounted in gymbals, so that the delicate needles were free to turn in any direction whatever. They were mounted upon jeweled bearings, but bearings made of such great strength, that Seaton protested.
“What’s the use, Mart? You don’t expect a watch to be treated like a stone-crusher. That needle weighs less than half a gram. Why mount it as though it weighed twenty pounds?”
“To be safe. Remember the acceleration the Lark will be capable of, and also that on some other worlds, which we hope to visit, this needle will weigh more than it does here.”
“That’s right, Mart, I never thought of that. Anyway, we can’t be too safe to suit me.”
When the compasses were done and the power through them had been adjusted to one-thousandth of a watt, the lowest they could maintain with accuracy, they focused each instrument upon one of a set of most carefully weighed glass beads, ranging in size from a pinhead up to a large marble, and had the beads taken across the country by Shiro, in order to test the sensitiveness and accuracy of the new instruments. The first test was made at a distance of one hundred miles, the last at nearly three thousand. They found, as they had expected, that from the weight of the object and the time it took the needle to come to rest after being displaced from its line by a gentle tap of the finger, they could easily calculate the distance from the compass to the object. This fact pleased Crane immensely, as it gave him a sure means of
