"Too late now," said Torr reasonably. And so it was; Ejan could see that the three brothers had turned away and were paddling evenly downstream, toward the river's mouth. "Come, Ejan," Torr said. "Let's fish."

When they had reached an open stretch of deep water the brothers took their net of woven flax and slipped into the water. The brothers swam apart until the net was stretched out, then Ejan hooked his big toe into the net's lower margin to open it out vertically. They had turned the net into a fence across the current; it was about fifteen meters long. The brothers began to swim forward, sweeping the water.

Languidly flowing, the water was warm on Ejan's skin, muddy, murky with green life.

After about fifty meters they swam together, closing the net. Their haul was not great- the fish had indeed been scared off today- but there were a few fat specimens that they threw into the canoe. They took care to release the smallest, most immature fish; nobody would eat a morsel when he could wait and take a fat adult in a few months. They pulled the net taut and prepared to swim upstream once more.

But now a cry went up from the shore, an eerie wail.

Ejan turned to Torr. "Mother." "Mother."

"We must go back."

They lodged their net over a tree stump; there it could wait. They scrambled back into the canoe, turned it, and thrust it back into the tangle of drifting debris that lined the riverbank.

When they got back to the encampment, they found their sisters trying to comfort their distraught mother. The three brothers hadn't even got out of sight of the shore before a tidal surge had smashed their fragile craft. None of them had been seen since; all of them had drowned.

Never again would Osa, Born, or Iner lash their canoes to Ejan's.

Ejan pushed his way through his siblings to his mother, and laid his hand on her shoulder. "I will make that journey," he said. "For Osa and the others. And I I will not die trying." will not die trying."

But his mother, her graying hair ragged, her eyes blurred with tears, only wailed more loudly.

Ejan was a remote descendant of Eyes and Finger, acolytes of the original Mother of Africa.

After Mother, the progress of mankind was no longer limited by the millennial pace of biological evolution. Now language and culture were themselves evolving at the speed of thought, feeding back on themselves, becoming ever more complex.

Not long after Mother's death, a new exodus from Africa had begun, a great diffusion of people, in all directions. Ejan's folk had gone east. Following the ancient footsteps of Far's walker kind, they had worked their way along the southern fringe of Eurasia, following the coastlines and archipelagos. Now there were people strung out in a great strip from Indonesia and Indochina, through India and the Middle East, all the way back to Africa. And as the populations slowly grew, there had been a gradual colonizing push out of those beachheads along the inland waterways into the interior of the great continent.

Ejan and Torr were the product of the purest strand of coastal wanderers, those who had kept up their seashore migrations generation after generation. To exploit the riches of the rivers, estuaries, coastal strips, and offshore islands, these people had gradually honed their skills in boat-building and fishing.

But now they faced a quandary. On this archipelago, off the southwestern corner of the Asian landmass, they had traveled as far as they could go: They had run out of land. And the place was getting crowded.

There were opportunities to go further; everybody knew that.

Though the latest glaciation had yet to reach its deepest cold, the sea level had already dropped hundreds of meters. In the coastal reshaping that resulted, the islands of Java and Sumatra had been joined with Southeast Asia to form a great shelf, and much of Indonesia had become a long peninsula. Similarly Australia, Tasmania, and New Guinea had been merged into a single mighty mass.

In this unique, temporary geography, there were places where the Asian landmass was separated from greater Australia by only a hundred kilometers or so.

Everybody knew the southern land was there. Brave or unfortunate sailors, washed far from the coast and the offshore islands, had glimpsed it. Nobody knew its true extent, but over the generations enough travelers' tales had accumulated for everyone to be sure that this was no mere island: this was a new land, extensive, green, rich, with a long and abundant coast.

To get there would be quite a feat. The people had gotten this far by island-hopping, moving through reasonably equable seas from one scrap of land to another, each clearly visible, one from the next. Moving from this last island to the southern lands- passing out of sight of land altogether- would be a challenge of a different order.

But still, to open up a new world, all it would take was for somebody bold enough to attempt the crossing. Bold enough, smart enough- and lucky.

Ejan took many days to select the tree he wanted.

With Torr at his side he walked through the fringes of the forest, studying sterculias and palms. He would stand beneath the trees, eyeing the lines of their trunks, tapping on their bark with his fist to detect any inner defect.

At last he selected a palm- very fat, very true, its trunk a bulky unblemished pillar. But it was a long way from his band's settlement. Not only that, the palm was a long way from any riverbank; they wouldn't even be able to float it home.

Torr thought about complaining about this, but when he saw the set expression on Ejan's small face he kept his counsel.

First the brothers felled the palm with their stone axes. Then they briskly stripped the bark off the trunk. The exposed wood was perfect, as Ejan had hoped, and very hard under his hand.

They hiked back to the encampment to enlist help to bring back the trunk. Though there was a great deal of sympathy for the loss of their three brothers, nobody relished the prospect of such a long and difficult haul through the forest. In the end it was only family members- only Ejan, Torr, and their three sisters- who returned to the felled palm.

When he had gotten the palm back to camp Ejan immediately got to work. Sliver by sliver he hollowed out the stem of the trunk, taking care to leave the pith intact at stem and stern. He used stone axes and adzes- quickly blunted, yet equally quickly knapped.

Torr helped for the first couple of days. But then he drew away. As the oldest remaining sibling, responsibility now lay heavily on him, and he devoted himself to the basic chores of the family, to staying alive.

After a few days Ejan's youngest sister, Rocha, brought him a small net bag full of dates. He set the dates down on the stern platform he was carving into the wood, and absently pushed them into his mouth while he worked.

Rocha, fifteen years old, was small, dark, slim- a quiet, intense girl. She walked around the trunk, seeing what he had done.

The hollow now extended through much of the trunk's length. The trunk's broad base would be the prow, and Ejan was leaving a broad platform here on which a harpooner could stand. A smaller flat seat at the stern would accommodate the helmsman. It was remarkable to see a boat emerging from the wood. But the great notch Ejan was digging into the trunk was still heartbreakingly shallow, the surfaces rough and unfinished.

Rocha sighed. "You are working so hard, brother. Osa used to put together a raft in a day, two at most."

He straightened up. He wiped sweat from his brow with his bare arm, and dropped another worn ax blade. "But Osa's raft killed him. The ocean between us and the southern land is not like the placid waters of the river. No raft is strong enough." He ran his hand along the inside of the hollow. "In this canoe I will be tucked safely inside the craft. So will my belongings. Even if I capsize, I will not be harmed, for the boat will easily be righted. Look here." He rapped on the trunk's exterior. "This trunk is very hard on the outside, but the pith is light inside. The wood is so buoyant it cannot even sink. This is the best way to make the crossing, believe me."

Rocha ran her small hand along the worked wood. "If you must make a canoe, Torr says, you should use bark. Bark canoes are easy to make. He showed me. You can use a single sheet of bark that you hold open with lumps of clay fore and aft, or else you sew it together from strips, and-"

"And you spend the whole journey bailing, and before you have got halfway across, you sink. Sister, I don't have to sew my hull together, and it cannot rip; my my canoe will not leak." canoe will not leak."

"But Torr thinks-"

"Too many think," he snapped. "Not enough do. do. I have finished the dates. Leave me now." And he bent to his work, scraping assiduously at the wood. I have finished the dates. Leave me now." And he bent to his work, scraping assiduously at the wood.

But she did not leave. Instead she clambered nimbly into the boat's rough interior. "If my words are of no use to you, brother, perhaps my hands will be. Give me a scraper."

Surprised, he grinned at her, and handed her an adze.

After that the work progressed steadily. When the canoe was roughly shaped Ejan thinned out the walls from the inside, making enough room for two people and their gear. To dry and harden the wood, small fires were lit carefully inside and outside the canoe.

It was a great day when brother and sister first took the canoe out onto the river, Ejan in the prow, Rocha in the stern.

Rocha was still an inexperienced canoeist, and the cylindrical craft would capsize at the slightest opportunity. But it would right itself just as easily, and Rocha learned to extend her sense of her own body's balance down through the canoe's center line, so that she and Ejan were able to keep the canoe upright with small muscular counteractions. Soon- at least on the still waters of the river- they were able to keep the canoe balanced without thinking consciously about it, and with their paddles they were able to generate good speed.

After the trials on the river Ejan spent more days working on the canoe. In places the wood had cracked and split as it dried. He caulked the flaws with wax and clay, and he applied resin to the inner and outer surfaces to protect against further splits.

When that was done, he judged the craft was ready for its first ocean trial.

Rocha demanded that she be allowed to accompany him. But he was reluctant. Although she had learned fast, she was still young, unskilled, and not as strong as she would eventually become. In the end, of course, he respected her opinion. Young or not, her life was her own to spend as she wished. That was the way of hunter-gatherer folk like these, and always would be: Their culture of mutual reliance bred mutual respect.

At last, for the first time, the canoe slid out of the river's broad mouth toward the open ocean. Ejan had loaded the canoe with boulders to simulate the cargo of food and water they would have to take with them for the real ocean crossing, which would likely be a journey of some days' duration.

As they passed, fisher folk on rafts and canoes stood up and yelled, waving their harpoons and fishing nets, and children ran along the bank, screaming. Ejan flushed with pride.

At first everything went well. Even when they had emerged from the river's mouth the water remained placid. Rocha gabbled excitedly about how easy the ocean was, how quickly they would make their crossing.

But Ejan was silent. He saw that the water around the canoe's prow was stained faintly brown, littered with bits of leaf matter and other debris. They were still in the river's outflow, where it pushed into the sea. If he tasted the water, probably it would be fresh. It was as if they had not yet left the river at all.

When they did hit the true ocean's currents, as Ejan had feared, the water suddenly became much more turbulent, and sharp, malevolent waves scudded across its surface. The simple cylindrical canoe rolled, and Ejan was immersed in cold, salty water. With practiced coordination they threw their bodies sideways to right the boat, and they came up gasping and soaked. But almost immediately the canoe capsized again. As the rolling went on, the bindings of their dummy cargo broke, and Ejan glimpsed the boulders he had stowed falling away into the deeper water.

When at last the boat stabilized he saw that Rocha had been thrown out. She quickly came up, spluttering and gasping.

He knew that the experiment was over. He dumped out the rest of the rocks, briskly paddled the canoe to his sister and hauled her out, and they began to make their way back to the river's mouth.

When they got back to their camp, their reception was subdued. Torr helped them berth the canoe, but he had little to say. Their mother was nowhere to be found. They had been close enough to the shore for their antics to be visible to everybody, painfully reminiscent of what had become of their brothers, Osa, Born and Iner.

Still Ejan was not put off. He knew that the crossing was possible in the canoe; it was just a question of skill and endurance- and he knew that determined as she was, poor Rocha did not yet have those qualities. If he was to reach the southern lands, he needed a stronger companion.

So he approached Torr.

Torr was working on a new canoe of his own, an elaborate construction of sewn bark. But he spent most of his time now gathering food and hunting. His back was bent from stooping over bushes and roots, and a great gash over his ribs, inflicted by a boar, was slow to heal.

Ejan thought his brother looked much older. In Torr he saw the solid, earthbound sense of responsibility that he took from the great-grandfather who had given him his name.

"Come with me," Ejan said. "It will be a great adventure."

"To attempt the crossing is not- necessary," Torr said awkwardly. "There is much to do here. Things are difficult for us now, Ejan. There are so few of us. It is not as it was." He forced a smile, but his eyes were flat. "Imagine the two of us out on the river in your magnificent canoe. How the girls will holler! And I pity any crocodile that breaks its teeth on our hull."

"I did not build the canoe for the river," Ejan said evenly. "I built it for the ocean. You know that. And to reach the southern land was the reason our brothers gave their lives."

Torr's face grew hard. "You think too much about our brothers. They are gone. They are gone. Their souls are with Ja'an until they return in the hearts of new children. I have tried to help you, Ejan. I helped you bring back your log. I hoped all this work would clear your head of your troubled dreams. But now it has gotten to the point where you are prepared to let the ocean kill you, as it did our brothers." Their souls are with Ja'an until they return in the hearts of new children. I have tried to help you, Ejan. I helped you bring back your log. I hoped all this work would clear your head of your troubled dreams. But now it has gotten to the point where you are prepared to let the ocean kill you, as it did our brothers."

"I have no intention of being killed," Ejan said, his anger burning deep.

"And Rocha?" Torr snapped. "Will you lead her her to her death for the sake of your dream?" to her death for the sake of your dream?"

Ejan shook his head, baffled. "If Osa were alive, he would come with me." He slapped the sewn hull of Torr's new canoe. "Two canoes are better than one. If this were Osa's canoe, he would strap it to mine and we would sail side by side across the ocean, until-"

"Until you both drowned!" Torr cried. "I am not Osa. And this is not his canoe." His anger and frustration were visible in his face now, Ejan saw, shocked- as was his fear. "Ejan, if we lose you-"

"Come with me," Ejan said evenly. "Strap your canoe to mine. We will defeat the ocean together."

Torr shook his head tightly, avoiding Ejan's eyes.

Sadly Ejan prepared to take his leave.

"Wait," said Torr softly. "I will not go with you. But you will take my canoe. It will ride alongside yours. My body will be here, digging roots." He grinned now, wistfully. "But my soul will be with you, in the canoe."

"Brother-"

"Just come back."

The use of Torr's canoe gave Ejan a new idea.

The second canoe, though it would be laden with food and other supplies, would not be manned. That meant it would not be as heavy as Ejan's, and to lash the canoes together side by side would not be the best solution for stability.

After a little thought and much experimentation, Ejan attached Torr's sturdy bark canoe to his own with two long crosspieces of wood. With this arrangement, the two canoes connected by an open framework of wood, it was almost as if he was building a kind of raft, founded on the canoes.

As his concept developed he became excited by the idea. Perhaps with this new way he could combine the best of the two designs. The rowers and their possessions would be tucked snugly inside the body of the dugout canoe, rather than being exposed on the surface of a raft, but the second canoe would give them the stability of a raft's wide platform.

With Rocha he took the new arrangement out for trials, in the river and skirting the ocean shore. The double-hull design proved more difficult to maneuver than a single canoe, but it was far more stable. Though they progressed farther out into the ocean than the first time they had tried out the dugout, they didn't capsize once. And because they didn't have to work constantly to keep the craft upright as they had the simple dugout, the journey was much less tiring.

At last Ejan felt he was ready.

He tried one last time to dissuade Rocha from coming with him. But in Rocha's eyes he saw a kind of hard restlessness, a rocky determination to meet this great challenge. Like Ejan's, her name had been handed down from the past; perhaps somewhere in the line of Rochas before her there had been another great traveler.

They loaded up the canoes with provisions- dried meat and roots, water, shells and skins for bailing, weapons and tools, even a bundle of dry wood to make a fire. They were trying to be prepared. They had no idea what they would find on that green shore to the south, no idea at all.

As they set off this time, there was no sense of celebration. People turned away, attending to their chores. Even Torr was not there to see the double canoe sliding smoothly out of the estuary. Ejan could not help but feel oppressed by their disapproval, even as he felt the smooth rocking of his craft as it cut through the deepening water.

But this modest expedition was the start of a great adventure.

All over the peninsula, Ejan's outrigger design was being derived independently. In some places the design evolved from double canoes, like Ejan's, with the eventual outrigger float descending from a degenerate second canoe. In some, the design was more like an opened-up raft. Elsewhere people were experimenting with simple poles lashed across a canoe's gunwales to improve its handling. Whatever its disparate origins, the outrigger design was a solution to the instability that before now had confined canoes to the rivers.

And in the generations to come the descendants of these folk in their outriggers would spread out across Australasia, the Indian Ocean, and Oceania. They would reach as far west as Madagascar off Africa's coast, east across the Pacific to Easter Island, north to Taiwan off the Chinese coast, and as far south as New Zealand, taking their language and culture with them. It was an epic migration: Indeed, it would take tens of thousands of years.

But in the end the children of these riverine folk would travel around more than two hundred and sixty degrees of the Earth's circumference.

Their smooth crossing of the strait to the new land was so easy as to be almost anticlimactic.

Ejan and Rocha followed an unknown coast. Eventually they reached a place where they could see a stream of what must be fresh water cutting out of the inland tangle of vegetation. They turned their craft to face the shore and paddled hard, until they felt the canoes' prows grinding into the bed of the shallowing sea. They had landed on a strip of beach, fringed by dense, tangled forest.

Rocha cried, "Me first, me first!" She leapt out of the dugout- or tried to; after a couple of days at sea, her legs gave way under her, and she slipped and fell on her backside in the water, laughing.

It wasn't a very dignified landing. Nobody made a speech or raised a flag. And there would be no monument here; in fact, in another thirty thousand years, this first landing site would be drowned by the rising sea. Nevertheless this was an extraordinary moment. For Rocha had become the first hominid ever to touch Australian soil, the first to set foot on the continent.

Ejan clambered out more carefully. Then, knee-deep in the warm, coastal water, they dragged their canoes until they were firmly grounded.

Rocha ran straight to the freshwater stream. She threw herself into it and rolled, sucking up great mouthfuls of it and scraping at her skin. "Ugh, the salt! I am caked in it." With the exuberance of youth, she scrambled up the stream and into the fringe of forest, seeking fresh fruit.

Ejan took a tremendous drink of the cold, crisp water, and immersed his head for long heartbeats. Then, his legs trembling, he walked up the beach. He studied the jungle. He recognized mangroves, palms; it was much as it had been at home. He wondered how far this new island stretched. And he wondered if there were, after all, people here.

Rocha squealed softly. He hurried to her side.

Through the tangle of vegetation something was moving. It was massive, yet it moved all but silently. It had a terrible reptilian stillness about it that evoked deep primal fears in their hearts. And now it came slithering out of the undergrowth. It was a snake, Ejan saw immediately, but a snake of a size he had never seen before. It was at least a pace across, and seven or eight paces long. Brother and sister grabbed each other and hurried from the forest, back to the beach.

"Beasts," Rocha whispered. "We have come to a land of mighty beasts."