The planet was a water world, bare of continents and only sparsely sprinkled with minor archipelagoes. The islands suited the Chafis' purpose admirably. "The Zid does not swim," Chafi Four radiated. "Marooned, it can do no harm to marine intelligences." "Also," Chafi Three pointed out as they dodged to the control cubicle again just ahead of the slavering Zid, "we may return later with a Canthorian hunting party and recover our investment." Closing their perception against the Zid's distracting ragings, they set to work with perfect coordination. Chafi Three set down the ship on an island that was only one of a freckling chain of similar islands. Chafi Four projected himself first to the opened port; then, when the Zid charged after him, to the herbivore-cropped sward of tropical setting outside. The Zid lunged out. Chafi Four teleported inside again. Chafi Three closed the port. Together they relaxed their perception shields in relief-- Unaware in their consternation that they committed the barbarous lapse of vocalizing, they twittered aloud when they realized the extent of their error. Above the far, murmurous whisper of expected marine cerebration there rose an uncoordinated mishmash of thought from at least two strong and relatively complex intelligences. "Gas-breathing!" Chafi Four said unbelievingly. "Warm-blooded, land-dwelling, mammalian!" "A Class Five culture," Chafi agreed shakenly. His aura quivered with the shock of betrayal. "The catalogue was _wrong_." Ironically, their problem was more pressing now than before. Unless checked, the Zid would rapidly depopulate the island--and, to check it, they must break a prime rule of Galactic protocol in asking the help of a new and untested species. But they had no choice. They teleported at once into the presence of the two nearby natives--and met with frustration beyond Ciriimian experience. * * * * * Jeff Aubray glimpsed the Ciriimian ship's landing because the morning was a Oneday, and on Onedays his mission to the island demanded that he be up and about at sunrise. For two reasons: On Onedays, through some unfailing miracle of Calaxian seamanship, old Charlie Mack sailed down in his ancient _Island Queen_ from the township that represented colonial Terran civilization in Procynian Archipelago 147, bringing supplies and gossip to last Jeff through the following Tenday. The _Queen_ would dock at Jeff's little pier at dawn; she was never late. Also on Onedays, necessarily before Charlie Mack's visit, Jeff must assemble his smuggled communicator--kept dismantled and hidden from suspicious local eyes--and report to Earth Interests Consulate his progress during the cycle just ended. The ungodly hour of transmission, naturally, was set to coincide with the closing of the Consul's field office halfway around the planet.