OLIVIA TURNED OUT to be pretty spry—more than a match, anyway, for Zula in her current condition. They hewed mostly to the trail and occasionally crossed tracks that had been carved across it by Jake in his impetuous plunge. Zula’s expectation that Jake would soon get far ahead of them turned out to be wrong. When the ATV moved, it moved faster than they could run, but he seemed to spend an inordinate amount of time hung up on obstacles or working his way around slopes too steep for it to negotiate. Its sound was always there, just a bit ahead of them, occasionally drowned out by gunfire. Some sort of weird, inappropriate family-competitive instinct made Zula want to catch and surpass it. But before this happened, they came in view of the cabin itself, its green sheet-metal roof nestled among the peaks of the surrounding trees, and then it became all about getting there as fast and as directly as possible.