And the picture wasn't an especially encouraging one.

"The main gate is shaped like this," Ilona said, sketching barely visible lines with her finger on the tabletop. "It's supposed to be electronically locked and made with twenty-centimeter-thick kyrelium steel, same as the interior section of the wall."

Briefly, Jonny tried to calculate how long it would take to punch a hole through that much kyrelium with his antiarmor laser. The number came out on the order of several hours. "Any of the house's fancy stonework on the outer side?"

"Not on the gate itself, but there are two relief carvings flanking it on the wall. About here and here." She pointed.

Sensor clusters, most likely, and probably weapons as well. Facing inward as well as outward? No way of knowing, but it wasn't likely to matter with twenty centimeters of kyrelium blocking the way. "Well, that only leaves going over the wall," he sighed. "What's he got up there?"

"As far as I know, nothing."

Jonny frowned. "He's got to have some defenses up there, Ilona. Five-meter walls haven't been proof against attackers since ladders were invented. Um... what about the corners? Any raised stonework or anything there?"

"Nope." She was emphatic. "Nothing but flat wall all the way around the grounds."

Which meant no photoelectric/laser beam setup along the wall. Could Tyler really have left such an obvious loophole in his defenses? Of course, anything coming over the wall could be targeted by the house's lasers, but that approach depended on temperamental and potentially jammable highspeed electronics; and even if they worked properly, a fair amount of the shot was likely to expend its energy on other than the intended target. Sloppy and dangerous. No, Tyler must have had something else in mind. But what?

And then a pair of stray facts intersected in Jonny's mind. Tyler had built his mansion along Reginine lines; and Jonny's late teammate, Parr Noffke, had been from that same world. Had he ever said anything that might provide a clue...?

He had. The day of the trainees' first modest test, the one Jonny had afterward nearly broken Viljo's face over. Our wall lasers, Noffke had commented, point up, not across.

And then, of course, it was obvious. Obvious and sobering. Instead of four lasers arranged to fire horizontally along the walls, Tyler had literally hundreds of the things lined up together like logs in an old palisade, aiming straight up from inside the wall. A horribly expensive barrier, but one that could defend against low projectiles and ground-hug missiles as well as grappler-equipped intruders. Quick, operationally simple, and virtually foolproof.

And almost undoubtedly the Trofts' planned deathtrap.

Jonny swallowed, the irony of it bitter on his tongue. This was exactly what he'd wanted: some insight into how the aliens expected to stop him... and now that he knew, the whole thing looked more hopeless than ever. Unless he could somehow get to the control circuitry for those lasers, there was no way he and Ilona would get beyond the wall without being solidly slagged.

He became aware that Ilona was watching him, a look of strained patience on her face. "Well? Any chance of getting through the gate?"

"I doubt it," Jonny shook his head. "But we won't have to. Up and over is a far better bet."

"Up and over? You mean climb a five-meter wall?"

"I mean jump it. I think I can manage it without too much trouble." In actual fact the wall's height was the least of their troubles, but there was no point telling the hidden listeners that.

"What about the defenses you said might be there?"

"Shouldn't pose any real problem," Jonny lied, again for the Trofts' benefit. He didn't dare appear too naive; it might arouse their suspicions. "I suspect Tyler's got his wall lasers built into elevating turrets at the corners. With all that stonework available to hide sensors in, there'd be no problem getting them up in time if someone started to climb in. I haven't seen that sort of arrangement on Adirondack before, but it's a logical extension of your usual defense laser setup, especially for someone with the classical aesthetics Tyler seems to have. Actually, I'm a lot more worried about getting to the wall in the first place. I want you to tell me everything you can remember about the route the Trofts used to get you to this room."

She nodded, and as she launched into a listing of rooms, hallways, and staircases, he knew she was satisfied with his spun-sugar theory. Now if only he'd similarly convinced the Trofts to let them get all the way to the deathtrap.

And if he could figure out a way through it.

His internal clock said ten p.m., and it was time to go.

Jonny had been of two minds about choosing a nighttime rather than an afternoon breakout. In the afternoon there would have been people beyond the Tyler Mansion's walls; crowds for the two fugitives to disappear into if they got that far, witnesses perhaps to their deaths—and the mansion's significance—if they didn't. But hiding in crowds made little sense if the Trofts were willing to slaughter civilians in order to get the two of them. Besides, forcing the Trofts' outdoor weaponry to rely on radar, infrared, and light amplification for targeting might prove a minor advantage.

Those were the reasons he gave Ilona. One more—that the aliens might not risk letting them even get to the wall in broad daylight—he kept to himself.

He was lying on his back on the table, hands folded across his chest; Ilona sat beside him, her knees pulled close to her chest, apparently contemplating the door. Ilona's inactivity wasn't an act: he'd quoted a ten-thirty jump-off time to her. Whether or not the Trofts could be fooled by so simple a trick he would probably never know, but it had certainly been worth a try.

Taking a deep breath, Jonny activated his omnidirectional sonic weapon.

There was a tingle in his gut, a slight vibration as the buried speakers brushed harmonics of natural body resonances. Straining his ears, he could almost hear the ultrasonic pitch changing as the sound dug into the walls, seeking resonances with the tiny audio and visual sensors open to it....

The full treatment was supposed to require a minute, but Jonny had no intention of giving the Trofts that much warning. He didn't need to knock out the sensors permanently, but just to fog as many of them as possible while he made his move. He gave it five seconds; and just as Ilona began looking around the room with a frown he lifted his left leg slightly and fired.

The upper hinge of the door literally exploded, scattering solid and semisolid bits of itself in a shower to the floor. Beside him, Ilona yelped with surprise; in a single smooth motion, Jonny slid forward so that he could target the lower hinge and fired again. This shot didn't hit the inner sections quite as cleanly, and the explosive vaporization that had taken out the upper hinge didn't occur. Jonny fired three more times, adding his fingertip lasers to the assault, and within seconds the hinge was dangling loosely against the wall. Gripping the edge of the table, he hurled himself feet-first at the hinge side of the door like a self-guided battering ram. The door creaked under the impact, displaced by a centimeter or two. Regaining his balance, Jonny jumped across the room, turned and tried it again, his hands providing a last-second boost from the table as he passed it. The table survived; the door, fortunately, did not. With a shriek of scraping metal, it popped out of its frame and sagged at an odd angle, held off the floor only by its lock mechanism.

"You said ten-thirty," Ilona growled. She was already at the door by the time he got his balance, peering cautiously outside.