_Argo IV_ answered Dunin's brown hand at the tiller, sliding south under a following breeze. Her chief designer Paul Mason liked to call her a sloop, admitting that on no planet would any sloop have cared to be found dead with a pair of twelve-foot oars amidships. She was thirty-six feet fore and aft. Without a sawmill, shaping boards for her strakes had been harder than trimming and placing the single tree trunk that was her keel. Much of her joining was with wooden pegs; there was iron in her too, from the single deposit of ore on the island of Adelphi. Her building had started seventeen months ago in the Year Nine. One month ago Paul's daughter Helen had cracked across her bow an earthen flask of wine brought to maturity by Nisana and _Argo IV_ had slipped out of the mouth of the Whitebeach River for a maiden voyage--a forty-mile circuit of the island, including the passage of a strait where a current from open ocean ran formidably between Adelphi and a small nameless island in the south. Since then she had journeyed short distances up and down the coast, learning her own fussy ways and teaching them to her makers. _Argo II_ had been a clumsy oared raft of heroic history. Nine Lucifer years ago, roughly the equivalent of twelve Earth years, _Argo II_ had not only brought fifteen survivors of a war to the island, she had also, broadened and repaired, returned to the mainland over the ten-mile channel to pick up a sixteenth survivor, Abara, and the gentle white beasts he had refused to abandon. He had guided them south, through seventy miles of unknown terrors, and ten miles further along the beach, until it came to an end at sheer cliffs; here _Argo II_ found him. One by one--probably no one but Abara could have coaxed them aboard--_Argo II_ had ferried all five of the olifants across. During the rains that came for a dark ending of Year Two, the swollen Whitebeach River had torn _Argo II_ from her moorings and she had been swept away down the channel. Now she would be driftwood scattered over the infinity of the unexplored; she was remembered. _Argo III_, still in existence and more often called Betsy, was only a boxed platform with outriggers and two pairs of oars. With four giants at the oars and a favorable current she could approximate three miles an hour and carry several tons. She had been built in the Year Four and was still busily bringing slabs of building stone from the base of the coastal range. The stone was red and black or sometimes purple, heavy, already smoother than marble without polishing; unlike any common stone of Earth, it was so hard that wind and sun and water over the centuries had done little with it. Wright believed that was why the coastal range could rise to such heights from a narrow base. While the years in their millions had turned other mountains to level ground, the glassy rock remained: it could be broken for use but defied erosion like a diamond.