I'm sorry for the wait, but things have become chaotic for me in the real world.

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The Treasure Hunter.

Harry smiled as he walked around the archaeologists' ship, clad in his diver suit, his wand out while he kept up the notice-me-not charm he had cast around himself to go unnoticed. Finding a way to the archaeological site was perhaps the easiest part of the whole plan, really; using magical transport tied to the Japanese Ministry of Magic, although he had needed to fill in some of the paperwork although he had no intention of telling them what he was doing, of course.

It wasn't a small favour, either.

The city had been found a long way between Hawaii and the Polynesian islands, and it was hard to get there in a short amount of time, and Harry wanted to get there, unnoticed preferably, without needing to use any kind of muggle transport. With such an expedition in the middle of the ocean, getting there was going to be impossible any other way. Harry didn't want to be seen. While many witches and wizards didn't care what happened in the muggle world although he had gathered there were groups who were ordered to take a great deal of notice to ensure the Statute was left intact, Harry knew that rule could be bent as the wizarding world would only let it go so far.

But once he had filled in the paperwork, Harry had managed to reach the part of the South Pacific where the archaeological dig was, and as he walked from laboratory to laboratory, all the while avoiding the members of the crew and the archaeologists themselves - while the charm prevented them from seeing him, there was a chance anything could happen - checking what they had found.

In a number of rooms on the ship, Harry found a number of research notes, photos, and a few artefacts that he took a good look at.

In that same room, Harry found the entire wall had become covered in a number of blown-up images, one of the most prominent was a map of the city. It resembled an almost shapeless mass of hexagonal pads where the city buildings sat on, many of the buildings were simple blocks or towers that were only a good 20 feet tall, but nothing taller than that, and there were masts on all of them where the people would unfurl the sails and move the city through the water. Dotted around the room were underwater photographs of the buildings of the city, and from here Harry could see this city was going to keep the marine scientists on this ship a lot of work. There were notes saying how they predated peoples like the Incas, the Toltecs, or the Mayans, and there were even signs of Ancient Roman, Phoenician and Persian architecture thrown into the mix of simple styles. But they were there. Harry had already been aware that the city's buildings, while simple, were likely the origin of so many inspirations for much of the ancient world, but how these people had done it over the centuries, Harry could only speculate.

In the meantime, he was more interested in the artefacts. The laboratories were full of them.

Some of them had been exposed to the elements, the parts of them were rusted through, or were so badly corroded they had fallen apart and lost their shape so it was impossible for the archaeologists to tell what they had looked like before, never mind what they had before the city went under.

They had learnt a great deal, though. The city was composed of a form of reinforced concrete which gave it more stability and strength, and they formed sections like a giant collection of lily pads. The concrete had held up well over the decades the city had been submerged. The more Harry went through the notes, he realised the archaeologists had discovered a great deal about the city in a short amount of time. Harry chuckled. He had learnt over the years the media in the magical world were told little and were just told to publish what they were given; it was a rule in the muggle world, too, ever since he had left Hogwarts the media were only given the barest minimum. Scientists did not want anyone to know the fuller details. They gave the media what they wanted them to know. It seemed to be like an unwritten rule for politicians, leaders, soldiers…and wizarding heroes, to tell people the absolute minimum.

They knew the city was composed of reinforced concrete, making the city more resilient than wood, and the city was moved by giant sails.

They knew water was pumped.

They had found rails, some kind of tramway for the movement of goods.

Some of the artefacts were simple, there were rusted and heavily corroded beyond recognition pieces of metal but there were other artefacts that looked almost like sculptures than anything practical.

They had even found pots, jars of glass and clay that predated Roman, Greek, Egyptian, and Phoenician. By centuries.

The archaeologists had found skeletons, but they hadn't yet discovered much about them.

But they had found places within the city that were watertight. That meant there were places within the city that had been sealed off for centuries, if not millennia. Harry rubbed his face as he checked through the notes, but his eyes crinkled in confusion when he saw how well engineered this city was. It had floatation tanks, like the ballast tanks of a submarine, designed to keep it afloat, and it seemed the archaeologists had already come to that conclusion themselves. And a few logical ideas had been dumped there as well; the city was designed to be floating so they'd need to add a few precautions to prevent sinking. But a floatation tank could be ruptured, and that was the current theory behind the sinking. Someone had burst the tanks, making the city sink, nobody knew why. Harry himself did not care.

But what he did find odd was how the city seemed designed to sink, and the people who'd built it had prepared for it by fashioning a primitive form of airlock while keeping the insides of some of the buildings bone dry. The scientists had been just as surprised, but they were making use of them. It wasn't every day a marine archaeologist found a sunken city where there were built-in airlocks, and the place was designed to act like a vast, ancient submarine vessel.

He would just go down to the seabed and take a look for himself.

Thanks to the gillyweed he had procured for himself before coming here he would get down to the city without any need to worry, and a simple flick of his wand would banish the effects of the plant from his system, Harry climbed down the ladder to the sea slowly. When the soles of his feet touched the water, the cold of the sea shocked him only a little bit despite his best efforts to prepare himself for it. Harry stuck his hand into his pouch to get the gillyweed out, but he had barely raised his hand to chew it when suddenly he felt the familiar anchor in the navel sensation that came from portkey travel but he wasn't touching anything like a portkey.

Totally unprepared for the trip, Harry screamed as he was torn through the magical vortex before he hit the ground hard.

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