what possessed the Bees to build such a maze here—" "Then we'd be the first to solve the problem of alien psychology," Farrell finished acidly, aping the older man's ponderous enthusiasm. "Lee, you know we'd have to follow those hive-building fiends all the way to 70 Ophiuchi to find out what makes them tick. And twenty thousand light-years is a hell of a way to go out of curiosity, not to mention a dangerous one." "But we'll go there some day," Stryker said positively. "We'll have to go because we can't ever be sure they won't try to repeat their invasion of two hundred years ago." He tugged at the owlish tufts of hair over his ears, wrinkling his bald brow up at the enigmatic maze. "We'll never feel safe again until the Bees are wiped out. I wonder if they know that. They never understood us, you know, just as we never understood them—they always seemed more interested in experimenting with slave ecology than in conquest for itself, and they never killed off their captive cultures when they pulled out for home. I wonder if their system of logic can postulate the idea of a society like ours, which must rule or die." "We'd better get on with our survey," Gibson put in mildly, "unless we mean to finish by floodlight. We've only about forty-eight hours left before dark." He moved past Stryker through the port, leaving Farrell to stare blankly after him. "This is a non-rotating world," Farrell said. "How the devil can it get dark, Lee?" Stryker chuckled. "I wondered if you'd see that. It can't, except when the planet's axial tilt rolls this latitude into its winter season and sends the sun south of the crater rim. It probably gets dark as pitch here in the valley, since the fog would trap even diffused light." To the patiently waiting mechanical, he said, "The ship is yours, Xav. Call us if anything turns up." Farrell followed him reluctantly outside into a miasmic desolation more depressing than he could have imagined. A stunted jungle of thorny brambles and tough, waist-high grasses hampered their passage at first, ripping at coveralls and tangling the feet until they had beaten their way through it to lower ground. There they found a dreary expanse of bogland where scummy pools of stagnant water and festering slime heaved sluggishly with oily bubbles of marsh gas that burst audibly in the hanging silence.