It was, however, with a vast reluctance that she reached for the timer itself. Long before she had headed
to Mars, the Chronologic Patrol had known that someone might well have gotten into the Dark Museum.
As the official entrance was well hidden, there were obviously good odds that someone had built his or
herown entrance. The planning group for this job had given Kalani the explosives in order to wreck the
entrance if she found it. No one had expected the illegal entrance to be anything more elaborate than a
drilled vertical shaft like the Chrono Patrol’s own drop shaft, or perhaps some sort of chance pathway
through the rubble left by the collapse of the upper levels.
No one had expected to find a massive, kilometers-long engineering project, let alone one with its own
self-destruct mechanism. Now Kalani was planning to touch off that self-destruct system, destroying a
fair-sized building and the tunnel under it. The folks back at HQ wanted a full visual record of her
mission—and that would most certainly have to include images of the tunnel’s and temple’s destruction.
That in turn meant she would have to stay close enough to record them.
A nice, simple, radio-controlled remote detonator would have suited the situation admirably. Head back
to the lander, do a detailed preboost checkout, do a high-hover to, say, fifteen hundred meters, push the
button, watch the bang, and boost for orbit. Unfortunately, she didn’t have a remote detonator.
A timer-controlled detonator made things far too exciting, forced her into too many guesses about how
long it would take to get her ship to that high-hover, and too much faith that nothing would go wrong.
Suppose she set the timer for too long and stood at high-hover for so much time she didn’t have enough
propellant left to reach orbit? Suppose she set it short, and the whole damn place went up while her ship
was still on the ground? Suppose she tripped and broke her wrist and couldn’t climb into the lander with
just one hand before the damned thing went off? Or suppose it didn’t matter when she set the thing for,
because the symbiote-mold had already eaten through the lander’s propellant plumbing? Or suppose she
was so tired she’d just wired things up with a short across the leads, so the detonators would go off the
moment she attached the timer? There was no way to be sure which, if any, answer would be right.
Just make the best guess you can,she told herself. Sensible advice, but what would the best guess be?
She thought it through as carefully as she could, balancing the dangers of too fast against those of too
slow.Call it twenty minutes, she told herself at last. She made the setting at once, before she was tempted
to work it all through again, and then again, just to be sure. She could invent enough doubt to paralyze
herself that way, too.
But she should at least check her wiring before she started the timer. She traced back her leads and
confirmed they were all where they should be. Then she looked, not at the leads, but at the explosive
charges. She couldsee the mold growing on it, a thin fuzz already coating the entire exposed surface of
each charge, with thicker patches blooming here and there, growing moment by moment as she stood
there and watched.Twenty minutes . Would there even be any explosive left to detonate by then? She
looked to the timer again and thought hard. Suddenly, she was sweating again, sweating as if her suit
cooling had cut out altogether.Heat. That mold was digesting the explosive fast enough that it had to be
generating some significant heat and some extremely weird chemical by-products. And for all she knew,
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