They rode out that afternoon, a small party consisting of Renly, Ser Cortnay, the three Stormlands lords, Lord Selwyn, Alexander, and a handful of guards. The road they followed was new, surfaced with the same crushed limestone that Renly had seen in Evenfall Town, and it climbed into the highlands with a gradient that was gentle enough for laden carts but direct enough to make good time.
The wall, when they finally saw it, stole Renly's breath.
It was not finished, that much was immediately apparent. But what had been built was already extraordinary. A curtain of stone, perhaps thirty feet high and ten feet thick at the base, running along the ridge line as far as the eye could see in either direction. Towers rose at regular intervals, square and solid and crowned with platforms that could accommodate siege engines or archers or both. The construction was massive, deliberate, the kind of building that spoke of decades of planning and centuries of use.
And it was only a fraction of what was planned.
"The wall will eventually encompass the entire perimeter of the island," Alexander explained, as they stood on a completed section and looked out at the sea below. "Seven major towers, each capable of independent defence, each equipped with catapults powerful enough to threaten any ship that approaches within range. The wall itself is constructed from local granite, reinforced with a concrete mixture of our own design that sets harder than the stone it joins. A determined army could take one tower, perhaps two. They could not take all seven, and without all seven, they cannot breach the wall."
"This is impossible," Lord Buckler said. His voice was faint, the voice of a man confronting something that his understanding of the world insisted could not exist. "The cost alone... the labour..."
"The cost is considerable but manageable, given our revenues. The labour comes from the same source as the labour that built Morne and Evenfall Town: people who wanted work and were willing to learn." Alexander's voice was calm, patient, the voice of a teacher explaining a simple concept to a slow student. "This section took eighteen months to complete with a workforce of approximately three thousand. The entire project will require another six to eight years, depending on how quickly we can train additional skilled workers. By the time it is finished, Tarth will be the most defensible position in the Seven Kingdoms outside of the great castles themselves."
"Defensible against whom?" Renly asked.
Alexander turned to look at him, and for a moment, something flickered in those violet eyes, something old and tired and full of a knowledge that no child should possess.
"Against anyone, Lord Renly. Against pirates and raiders. Against ambitious lords who might think a wealthy island is worth the taking. Against invasion fleets from across the Narrow Sea." He paused. "Against dragons, if it comes to that."
"Dragons," Ser Cortnay repeated. "The dragons are dead. They have been dead for more than a century."
"The dragons in Westeros are dead. But the world is larger than Westeros, Ser Cortnay, and history has a way of repeating itself in unexpected ways." Alexander turned back to the view, to the sea and the sky and the wall that stretched along the ridge like the spine of some enormous beast. "I am not a prophet. I cannot see the future. But I can prepare for it, and I prefer to be prepared for threats that may never come than unprepared for threats that do."
The silence that followed was heavy with implications that Renly did not entirely understand but could feel nonetheless. There was something in the boy's words, something in his tone, that suggested knowledge or at least suspicion of things that ordinary people did not consider. It was unsettling, and it was also, in a strange way, reassuring. If someone was thinking about these things, preparing for these contingencies, then perhaps the future was not quite as fragile as it sometimes felt.
"The Genius of Tarth," Renly said softly. "That is what they call you, you know. In the taverns of King's Landing. In the halls of Storm's End. The Genius of Tarth, the boy who rebuilt an island."
"I have heard the name," Alexander said. "I do not particularly care for it. Genius implies something innate, something given rather than earned. Everything I have done, I have done through work and planning and the help of people who believed in what we were building. That is not genius. That is merely competence, applied consistently over time."
"And yet the result is..." Renly gestured at the wall, at the view, at the whole impossible vista that surrounded them. "This."
"The result is a beginning." Alexander's voice was quiet but certain. "We have accomplished a great deal in three years, yes. But the work is not finished. It will not be finished in my lifetime, or in my children's lifetime, or perhaps ever. Building is not something you complete and then stop. Building is something you do, continuously, adapting to new circumstances and new challenges and new opportunities as they arise." He looked at Renly with those Valyrian, ancient eyes. "That is what I want Tarth to become, Lord Renly. Not merely a wealthy island or a strong fortress, but a place that is always building. Always growing. Always preparing for whatever the future might bring."
"Some might call that ambition."
"Some might call it survival. The distinction depends largely on one's perspective." Alexander smiled, a small, private expression that transformed his serious face into something almost warm. "I prefer to think of it as responsibility. My father gave me this island to help him care for. My sister trusts me to help her build something worthy of her. The people who work for us trust us to provide for them and protect them. Ambition is what you have when you want something for yourself. Responsibility is what you have when others are depending on you."
Renly thought about that. He thought about Robert, who had wanted the throne and gotten it and now seemed to regard it as a burden rather than a prize. He thought about Stannis, who had wanted recognition and gotten Dragonstone and now brooded over the perceived slight in his island exile. He thought about himself, who had wanted... what? Power? Influence? The respect of men who had known him as a child?
Or had he wanted something else entirely, something that he had never quite allowed himself to name, something that this strange, serious, extraordinary boy seemed to understand in a way that Renly himself did not?
"You are a remarkable person, Alexander Tarth," he said. "I came to this island expecting to see a minor house with delusions of grandeur. Instead, I find something that I do not quite have words for."
"Then perhaps you could help us find the words," Alexander said. "You my lord are the Master of Laws. You have a seat on the small council. You have influence that we do not have and access to places that we cannot reach. If you believe that what we are building here is worth supporting, then support us. Not with gold or soldiers, we have both, but with your voice. Speak well of Tarth in the places where speaking well of Tarth will matter."
It was, Renly realised, the request that the entire visit had been building toward. The tour, the feast, the revelations, the wall: all of it had been designed to bring him to this moment, standing on the battlements of an impossible fortification, looking at a boy who was asking for his endorsement as casually as another child might ask for a sweet.
And the remarkable thing was that he wanted to say yes.
"I will speak well of Tarth," he said. "Not because you have asked me to, but because what I have seen here deserves to be spoken of well. You are building something remarkable, Alexander. I do not know whether it will succeed in whatever larger purpose you have in mind, but I know that the effort itself is worthy of respect."
"Thank you, Lord Renly." Alexander inclined his head, the gesture of a subordinate acknowledging a superior, though something in his eyes suggested that he considered the dynamic rather more complicated than the formal courtesies implied. "Your support means a great deal to us."
"Just remember," Renly said, "that support can be withdrawn as easily as it is given. If you ever use what you are building here for purposes that conflict with the realm's interests, you will find me considerably less accommodating."
"I would expect nothing less." Alexander's smile broadened slightly. "The realm's interests and Tarth's interests are, I believe, more closely aligned than you might think. We want peace, prosperity, and stability. We want a Seven Kingdoms that is strong enough to defend itself against threats both foreign and domestic. We want a future worth living in." He paused. "I suspect, Lord Renly, that you want the same things."
"I do," Renly admitted. "Though I am less certain than you seem to be about how to achieve them."
"That is the difference between us, I guess my lord. You are uncertain. I am merely determined." Alexander turned back to the view, to the sea and the sky and the endless horizon that stretched toward futures that neither of them could see. "Certainty is overrated, Lord Renly. It makes people rigid, unwilling to adapt when circumstances change. Determination, on the other hand, is merely a refusal to give up. You do not need to know exactly where you are going to keep moving forward. You only need to believe that forward is better than standing still."
Renly looked at the boy, at his serious face and his ancient eyes and the way he stood on the wall as though he had been born there, as though this impossible structure were as natural to him as breathing.
"You are the second coming of Bran the Builder," he said. "That is what they will call you, in the years to come. The boy who built a wall."
"Bran the Builder had giants to help him," Alexander said. "I only have people. Ordinary people, doing extraordinary things because someone gave them the opportunity and the tools and the belief that what they were building mattered." He looked at Renly, and for just a moment, the mask of composed maturity slipped, and Renly glimpsed something beneath it: a child, yes, but also something else. Someone who had seen more than a child should have seen and had decided, against all evidence and all reason, to do something about it.
"That," Alexander said softly, "is the real secret, Lord Renly. Not genius or magic. Not even money. People. Given the right circumstances, people are capable of almost anything."
The wind picked up, carrying the salt smell of the sea and the distant sound of hammers from the construction site below. Renly stood on the Wall of Tarth, looking out at a future that was being built stone by stone before his eyes, and felt, for the first time in longer than he could remember, something that might have been hope.
Whatever Alexander Tarth was planning, whatever he was preparing for, Renly wanted to see it succeed. Not because the boy had convinced him, though he had. Not because the evidence was compelling, though it was. But because, in some way that he could not quite articulate, the future that Alexander was building felt like a future worth believing in.
And in a world that often felt devoid of things worth believing in, that was no small gift.
"Come my lord," Alexander said, breaking the moment with the practicality that seemed to be his natural mode. "There is more to see, and the light is fading. Tomorrow you leave for King's Landing, and I would rather you left with a complete picture than a partial one."
"Lead on, then," Renly said. "I have come this far. I might as well see the rest."
Alexander turned and led the way along the wall, his small figure silhouetted against the setting sun, and Renly followed, thinking about everything he had seen and everything he had heard and everything that the future might hold.
Behind them, the Wall of Tarth stretched into the distance, incomplete but undeniable, a monument to ambition and determination and the strange, impossible mind of a boy who had decided that the world could be better and had set about making it so.
The Genius of Tarth, they called him.
Renly was beginning to think that even that title might not be grand enough for what Alexander Tarth was actually trying to accomplish.
But that, he supposed, was a question for another day.
For now, there was a wall to see, and a future to contemplate, and a journey home that would be filled with thoughts of everything he had witnessed on an island that had once been unremarkable and was now, impossibly, inevitably, the most interesting place in the Seven Kingdoms.
The sun set behind the mountains of Tarth, painting the sky in shades of gold and purple and red, and the Wall cast a long shadow across the land below, a shadow that would only grow longer in the years to come.
Renly followed the boy into that shadow, and wondered, not for the first time and certainly not for the last, what exactly he had stumbled into.
And whether, when the time came, he would have the wisdom to be on the right side of it.