Figure C17 EXTREMES
From such a distant past, the present seems
To dazzle and confuse us. Rocky walls
Rough-hewn glow white in horizontal beams
Of the low sun, which e’en at twilight spalls
Hot ions from the stone on which it falls,
Yet at our feet the floor is all of ice.
The sunlight sweeps: at intervals, it stalls
As MERCURY turns three times, orbits twice,
Its polar craters in eternal winter’s vise.