A sphere with four heads, who must be the dead of the future, traveling backwards through time, looking for pasture. We can see up through their necks, and learn that their heads are hollow. Each is attached by stone cranium to a facet-cut planet covered with triangular fields, mark of an agriculture that will always remain unnatural and unknowable to the living.     That afternoon, out of the dark machinery, one of the dead of the future arrived.