THE COURSE OF LOGIC They made one little mistake—very natural—and disastrous! The male silth plodded forward wearily at sixty miles an hour, pausing only long enough to uproot and wolf down one of the rare scrub trees directly in its path. Its three hundred tons of massive body shook the ground as the great hind legs thumped along, and every cell of it ached with hunger. It was warm blooded, despite its vaguely reptilian appearance. Only meat could satisfy its need for energy. But the great herds lay a thousand miles to the north of this barren land. Inside the silth, the two-pound network of converted nerve cells that was Arnek brooded darkly in self-pity and resentment against the inflexible female logic of his mate. Ptarra had won her point, as she always did; now she might at least

