This style of greeting was a throwback to the early days of the Cloud Ark and the first generations spawned on Cleft by the Seven Eves. People then had spent a lot of time in space suits equipped with outer visors that could be flipped up or down to compensate for sunlight. When the visor was pulled down, it concealed the wearer’s face behind a reflective metallized screen. When it was pushed up, the face could be seen. In the crowded environments of those days, the upward movement of the hand had become a signal meaning "Hello, I am available for social interaction," and its reverse had come to mean "Goodbye" or "I wish for privacy now." These gestures’ practical necessity had withered away as the human races had spread out into habitats where they could get privacy whenever they desired it. They lived on, however, as salutes. Beled Tomov had opted for a military style, using the right hand, the subtext being "I am not going to kill you with a concealed weapon." In gravity, the next move might then have been to reach out for a handshake. In zero gee this usually wasn’t practical and so was rarely done. The left-handed version suggested a nonmilitary vocation, implying that the saluter’s right hand was busy doing something useful. The variations in hand position were racial and their origins were the subject of folkloric research. All agreed, however, that they were useful for signaling one’s race when far away, or when obscured in a space suit. The cues in size, shape, posture, and bearing that distinguished the races could be subtle, particularly when it was not possible to see facial features and hair color. Rhys Alaskov had the honey hair and freckled skin typical of a Dinan. Teklans too were fair. But where Rhys had an open, appealing face and an engaging manner, Beled was all cheek- and jawbones, sleek and bony at the same time, eyes so blue they were nearly white, hair like fiber-optic glass, cropped close to his skull. His affect matched his look. Kath Two was dark brown, with green eyes and woolly black hair. Close, in other words, to the way Eve Moira had looked. Among the three in this flivver, the largest contrast was therefore between her and Beled. And yet five thousand years of acculturation shaped the way they would interact. If some crisis were to arise, Kath Two and Beled would likely find themselves back to back, each instinctively seeking qualities wanted in the other. And in the absence of a crisis, they might find themselves front to front. A similar complementary relationship obtained between Dinans and Ivyns, but as it happened Rhys Alaskov was without an opposite number at the moment—that empty fourth couch.