Farrell shrugged. "I'd agree with you offhand if it weren't for Gib's bullheaded habit of being right. I hope he finds it soon, if it's here. I'll probably be standing his watch until he's satisfied." Stryker looked relieved. "Would you mind taking it tonight? I'm completely bushed after today's logging." Farrell waved a hand and took up his magnoscanner. It was dark outside already, the close, soft night of a moonless tropical world whose moist atmosphere absorbed even starlight. He dragged a chair to the open port and packed his pipe, settling himself comfortably while Stryker mixed a nightcap before turning in. Later he remembered that Stryker dissolved a tablet in his glass, but at the moment it meant nothing. In a matter of minutes the older man's snoring drifted to him, a sound faintly irritating against the velvety hush outside. Farrell lit his pipe and turned to the inconsistencies he had uncovered. The Arzians did not swim, and without boats.... It occurred to him then that there had been two of the pink fishers on the islet each morning, and the coincidence made him sit up suddenly, startled. Why two? Why not three or four, or only one? He stepped out through the open lock and paced restlessly up and down on the springy turf, feeling the ocean breeze soft on his face. Three days of dull routine logwork had built up a need for physical action that chafed his temper; he was intrigued and at the same time annoyed by the enigmatic relation that linked the Arzian fishers to the dragons and squids, and his desire to understand that relation was aggravated by the knowledge that Arz could be a perfect world for Terran colonization. That is, he thought wryly, if Terran colonists could stomach the weird custom pursued by its natives of committing suicide in pairs. He went over again the improbable drama of the past three mornings, and found it not too unnatural until he came to the motivation and the means of transportation that placed the Arzians in pairs on the islet, when his whole fabric of speculation fell into a tangled snarl of inconsistencies. He gave it up finally; how could any Earthman rationalize the outlandish compulsions that actuated so alien a race? He went inside again, and the sound of Stryker's muffled snoring fanned his restlessness. He made his decision abruptly, laying aside the magnoscanner for a hand-flash and a pocket-sized audicom unit which he clipped to the belt of his shorts.