"It's stopped, maybe."
"Look at the second hand."
The red sweep was running. Mitch stared at it for a moment, then rose slowly to his feet and walked to her side. He took the small clock down from its hook and turned it over in his hands. Then he traced the cord to the wall outlet. The plug was held in place by a bracket so that it could not be removed.
The sweep hand moved slowly, it seemed. Silently he removed the screws from the case and stared inside at the works.
Then he grunted surprise. "First clock I ever saw with elliptical gears!"
"What?"
"Look at these two gears in the train. Ellipses, mounted at the foci. That's the story. For a while the clock will run faster than the other one. Then it'll run slower." He handled it with growing excitement. "That's
it,
Marta—the key. Central must have another clock just like this one. The amount of lead or lag—in minutes—is probably the code!"
He moved quickly to the direct-contact unit. "Tell me the time on the other clock!"
She hurried into the living room and called back, "Ten-seventeen and forty seconds ...forty-five ...fifty—"
The other clock was leading by five and one-quarter minutes. He typed 5.250 on the keyboard. Nothing happened. "You sure that's right?" he called.
"It's now ten-eighteen—ten... fifteen ...twenty."
The clock was still slowing down. He tried 5.230, but again nothing happened. The unit refused to respond. He arose with an angry grunt and began prowling around the library. "There's something else," he muttered. "There must be a modifying factor. That clock's too obvious anyway. But what else could they be measuring together except time?"
"Is that another clock on his desk?"
"No, it's a barometer. It doesn't—"
He paused to grin. "Could be! The barometric pressure difference from the mean could easily be mechanically added or subtracted from the reading of that wacky clock. Visualize this, inside of Central: The two clock motors mounted on the same shaft, with the distance between their indicator needles as the code number. Except that the distance is modified by having a barometer rigged up to shift one of the clocks one way or the other on its axis when the pressure varies. It's simple enough."
She shook her head. Mitch took the barometer with him to the unit. The dial was calibrated in atmospheres, and the pressure was now 1.03. Surely, he thought, for simplicity's sake, there would be no other factor involved in the code. This way, Sarquist could have glanced at his watch and the wall clock and the barometer and could have known the code number with only a little mental arithmetic. The wall time minus the wrist time plus the barometer's reading.
He called to the girl again, and the lag was now a little over four minutes. He typed again. There was a sharp click as the relays worked. The screen came alive, fluttered with momentary phosphorescence, then revealed the numbers in glowing type.
"We've got it!" he yelled to Marta.
She came to sit down on the rug. "I still don't see what we've got."
"Watch!" He began typing hurriedly, and the message flashed neatly upon the screen.
CENTRAL FROM SARQUIST. CLEAR YOUR TANKS OF ALL ORDINANCE DATA, EXCEPT ORDINANCES PERTAINING TO RECORDING OF INFORMATION IN YOUR TANKS. PREPARE TO RECORD NEW DATA.
He pressed the answer button and the screen went blank, but the reply was slow to come.
"It won't work!" Marta snorted. "It knows you aren't Sarquist. The subunits in the street have seen us."
"What do you mean by 'know,' and what do you mean by 'see'? Central isn't human."
"It knows and it
sees."
He nodded. "Provided you mean those words in a mechanical sense. Provided you don't imply that she
cares
what she knows and sees, except where she's required to 'care' by enforced behavior patterns—ordinances."
Then the reply began crawling across the screen. SARQUIST FROM CENTRAL. INCONSISTENT INSTRUCTIONS. ORDINANCE 36-J, PERTAINING TO THE RECORDING OF INFORMATION, STATES THAT ORDINANCE DATA MAY NOT BE TOTALLY VOIDED BY YOU EXCEPT DURING RED ALERT AIR WARNING.
"See?" the girl hissed.
DEFINE THE LIMITS OF MY AUTHORITY IN PRESENT CONDITIONS, he typed. MAY I TEMPORARILY SUSPEND SPECIFIC ORDINANCES?
YOU MAY SUSPEND SPECIFIC ORDINANCES FOR CAUSE, BUT THE CAUSE MUST BE RECORDED WITH THE ORDER OF SUSPENSION.
Mitch put on a gloating grin. READ ME THE SERIES NUMBERS OF ALL LAWS IN CRIMINAL AND TRAFFIC CODES.
The reaction was immediate. Numbers began flashing on the screen in rapid sequence. "Write these down!" he called to the girl.
A few moments later, the flashing numbers paused. WAIT, EMERGENCY INTERRUPTION, said the screen.
Mitch frowned. The girl glanced up from her notes. "What's—"
Then it came. A dull booming roar that rattled the windows and shook the house.
"Not another raid!" she whimpered.
"It doesn't sound like—"
Letters began splashing across the screen. EMERGENCY ADVICE TO SARQUIST. MY CIVILIAN DEFENSE CO-ORDINATOR HAS BEEN DESTROYED. MY ANTIAIRCRAFT COORDINATOR HAS BEEN DESTROYED. ADVISE, PLEASE.
"What happened?"
"Frank Ferris!" he barked suddenly. "The Sugarton crowd—with their dynamite! They got into the city."
CENTRAL FROM SARQUIST, he typed. WHERE ARE THE DAMAGED COORDINATORS LOCATED?
UNDERGROUND VAULT AT MAP COORDINATES K-81.
"Outside the city," he breathed. "They haven't got to the main tanks yet. We've got a little time."
PROCEED WITH ORDINANCE LISTING, he commanded.
Half an hour later they were finished. Then he began the long task of relisting each ordinance number and typing after it: REPEALED; CITY EVACUATED.
"I hear gunshots," Marta interrupted. She went to the window to peer up and down the dimly lighted streets.
Mitch worked grimly. It would take them a couple of hours to get into the heart of the city, unless they knew how to capture a robot vehicle and make it serve them. But with enough men and enough guns, they would wreck subunits until Central withdrew. Then they could walk freely into the heart of the city and wreck the main coordinators, with a consequent cessation of all city services. Then they would be free to pillage, to make a mechanical graveyard of the city that awaited the return of man.
"They're coming down this street, I think," she called.
"Then turn out all the lights!" he snapped, "and keep quiet." "They'll see all the cops out in the street. They'll wonder why."
He worked frantically to get all the codes out of the machine before the Sugarton crowd came past. He was destroying its duties, its habit patterns, its normal functions. When he was finished it would stand by helplessly and let Ferris's gang wreak their havoc, unless he could replace the voided ordinances with new, more practical ones.
"Aren't you finished yet?" she called. "They're a couple of blocks away. The cops have quit fighting, but the men are still shooting them."
"I'm finished now!" He began rattling the keyboard frantically.
SUPPLEMENTAL ORDINANCES: #1: THERE IS NO LIMIT OF SUBUNIT EXPENDITURE.
YOU WILL NOT PHYSICALLY INJURE ANY HUMAN BEING, EXCEPT IN DEFENSE OF CENTRAL COORDINATOR UNITS.
ALL MECHANICAL TRAFFIC WILL BE CLEARED FROM THE STREETS IMMEDIATELY.
YOU WILL DEFEND CENTRAL COORDINATORS AT ALL COSTS.
THE HUMAN LISTED IN YOUR MEMORY UNITS UNDER THE NAME 'WILLIE JESSER" WILL BE ALLOWED ACCESS TO CENTRAL DATA WITHOUT CHALLENGE.
TO THE LIMIT OF YOUR ABILITY YOU WILL SET YOUR OWN TASKS IN PURSUANCE OF THE GOAL: TO KEEP THE CITY'S SERVICES INTACT AND IN GOOD REPAIR, READY FOR HUMAN USAGE.
YOU WILL APPREHEND HUMANS ENGAGED IN ARSON, GRAND THEFT, OR PHYSICAL VIOLENCE AND EJECT THEM SUMMARILY FROM THE CITY.
YOU WILL OFFER YOUR SERVICES TO PROTECT THE PERSON OF WILLIE JESSER.
"They're here!" shouted the girl. "They're coming up the walk!"
—AND WILL ASSIST HIM IN THE TASK OF RENOVATING THE CITY, TOGETHER WITH SUCH PERSONS AS ARE WILLING TO HELP REBUILD.
The girl was shaking him. "They're here, I tell you!"
Mitch punched a button labeled "commit to data," and the screen went blank. He leaned back and grinned at her. There was a sound of shouting in the street, and someone was beating at the door.
Then the skaters came rolling in a tide of sound two blocks away. The shouting died, and there were several bursts of gunfire. But the skaters came on, and the shouting grew frantic.
She muttered: "Now we're in for it."
But Mitch just grinned at her and lit a cigarette. Fifty men couldn't stand for long against a couple of thousand subunits who now had no expenditure limit.
He typed one last instruction into the unit. WHEN THE PLUNDERERS ARE TAKEN PRISONER, OFFER THEM THIS CHOICE: STAY AND HELP REBUILD, OR KEEP AWAY FROM THE CITY.
From now on, there weren't going to be any nonparticipators.
Mitch closed down the unit and went out to watch the waning fight.
A bigger job was ahead.
THE COLONEL'S SECRETARY heard clomping footsteps in the corridor and looked up from her typing. The footsteps stopped in the doorway. A pair of jet-black eyes bored through her once, then looked away. A tall, thin joker in a space commander's uniform stalked into the reception room, sat in the corner, and folded his hands stiffly in his lap. The secretary arched her plucked brows. It had been six months since a visitor had done that—walked in without saying boo to the girl behind the rail.
"You have an appointment, sir?" she asked with a professional smile.
The man nodded curtly but said nothing. His eyes flickered toward her briefly, then returned to the wall. She tried to decide whether he was angry or in pain. The black eyes burned with cold fire. She checked the list of appointments. Her smile disappeared, to be replaced by a tight-lipped expression of scorn.
"You're Space Commander Eli Roki?" she asked in an icy tone.
Again the curt nod. She gazed at him steadily for several seconds. "Colonel Beth will see you in a few minutes." Then her typewriter began clattering with sharp sounds of hate.
The man sat quietly, motionlessly. The colonel passed through the reception room once and gave him a brief nod. Two majors came in from the corridor and entered the colonel's office without looking at him. A few moments later, the intercom crackled, "Send Roki in, Dela. Bring your pad and come with him."
The girl looked at Roki, but he was already on his feet, striding toward the door. Evidently he came from an unchivalrous planet; he opened the door without looking at her and let her catch in when it started to slam.
Chubby, elderly Colonel Beth sat waiting behind his desk, flanked by the pair of majors. Roki's bearing as he approached and saluted was that of the professional soldier, trained from birth for the military.
"Sit down, Roki."
The tall space commander sat at attention and waited, his face expressionless, his eyes coolly upon the colonel's forehead. Beth shuffled some papers on his desk, then spoke slowly.
"Before we begin, I want you to understand something, commander."
"Yes, sir."
"You are not being tried. This is not a court-martial. There are no charges against you. Is that clear?"
"Yes, sir."
The colonel's pale eyes managed to look at Roki's face without showing any contempt. "This investigation is for the record, and for the public. The incident has already been investigated, as you know. But the people are aroused, and we have to make a show of some kind."
"I understand, sir."
"Then let's begin. Dela, take notes, please." The colonel glanced at the papers before him. "Space Commander Roki, will you please tell us in your own words what happened during patrol flight Sixty-one on fourday sixmonth, year eighty-seven?"
There was a brief silence. The girl was staring at the back of Roki's neck as if she longed to attack it with a hatchet. Roki's thin face was a waxen mask as he framed his words. His voice came calm as a bell and clear.
"The flight was a random patrol. We blasted off Jod VII at thirteen hours, Universal Patrol Time, switched on the high-C drive, and penetrated to the ten-thousandth level of the C'th component. We re-entered the continuum on the outer patrol radius at thirty-six degrees theta and two-hundred degrees psi. My navigator threw the dice to select a random course. We were to proceed to a point on the same co-ordinate shell at thirty theta and one-fifty psi. We began—"
The colonel interrupted. "Were you aware at the time that your course would intersect that of the mercy ship?"
The girl looked up again. Roki failed to wince at the question. "I was aware of it, sir."
"Go on."
"We proceeded along the randomly selected course until the warp detectors warned us of a ship. When we came in range, I told the engineer to jockey into a parallel course and to lock the automatics to
keep
us parallel. When that was accomplished, I called the unknown freighter with the standard challenge."