T1 was only twenty square miles. In case T1 came up empty, Steve chose three other unexplored areas to survey. He called these T2, T3, and T4. T2 was a deep valley surrounded by white limestone cliffs that had also been rumored to contain the White City. T3 was an area like T1—difficult to get to, scientifically unexplored, a gentler landscape with large open areas, locked in by mountains. T4 was the valley where Elkins believed Sam Glassmire had found his ruin.
