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In fact, what attracted Yang Jing was not the piles of second-hand books on the stall, but the old-looking maps hanging on the stands of the stall.

Yang Jing came closer and carefully examined these maps that looked ancient.

The owner of the stall was busy talking to another customer. When he saw Yang Jing coming over, he just greeted him and continued talking to the customer. Yang Jing was happy that no one was disturbing him.

There are seven maps in total, all well protected by plastic wrap.

This is also a common way for vendors at flea markets to protect fragile items. Maps are just pieces of paper and can be damaged if not carefully handled, so it is not surprising that this vendor used this method to protect these very old maps.

The "youngest" of the seven maps is about a hundred years old. It is a map from the First World War, and it is obviously a military map from a certain Allied command.

Yang Jing took out a magnifying glass from his pocket. He bought it from a store next to the hotel after dinner last night.

I put the magnifying glass on the lower right corner of the map and indeed saw the source of the map.

This is a large-scale map of the Kingdom of Bulgaria, one of the Central Powers during World War I. Some military deployments near Plovdiv, an important city in central Bulgaria at the time, are clearly marked with different colored pens.

Obviously, this map is a military map of the time when the Kingdom of Bulgaria, one of the Central Powers, fought with the Allied forces near Plovdiv.

If such a map were placed in China, it would probably be considered a rare cultural relic. But in Europe and the United States, such maps cannot be said to be everywhere, at least there are definitely quite a few. Especially this kind of local military operation map involving only one place, the value is even less high.

Yang Jing shook his head slightly, sentencing this map to death. Anyway, he had no intention of collecting this map. He was not a war enthusiast, and he really had no love for this kind of bloody map.

The second map is a map of the United States from the late 19th century. It has little collection value, so I passed it.

The map for Chapter 3 is also from the United States, but it is from an earlier time. Yang Jing also rejected this map without hesitation.

The fourth map aroused Yang Jing's interest.

Strictly speaking, this map is not a map, but a nautical chart. However, this nautical chart is drawn very roughly. Yang Jing can barely recognize that this nautical chart should be a chart of the North Atlantic and part of the waters near the east coast of the United States and Canada.

This nautical chart is not made of paper, but seems to be made of the legendary sheepskin. However, because it is wrapped in plastic, Yang Jing is unable to confirm the material used to make this nautical chart.

From this somewhat blurry nautical chart, one can barely make out the east coast of the United States and Canada. Of course, Greenland and Iceland in the North Atlantic and Newfoundland Island on the east coast of Canada can still be seen.

Moreover, this nautical chart does not seem to be a complete nautical chart, but more like a part torn from a larger nautical chart. Because at the bottom of the nautical chart, near the Bermuda Islands, the map shows a torn ripple, and at the top, almost half of Greenland is also torn.

Obviously, this nautical chart should have originally belonged to a larger and more complete nautical chart, but for some unknown reason, this part was torn off.

What attracted Yang Jing the most was not the raw material of this nautical chart, nor the history of this nautical chart, but the clear locations marked on this nautical chart and a broken route.

There are very few places shown on this map. Apart from Greenland and Newfoundland, there are only two places, Boston and New York. Even Iceland is not specifically marked on this map, but is just the shape of an island.

Needless to say, Boston and New York are the two cities with the longest history in the entire United States. This map should be a hand-drawn nautical chart in the early eighteenth century, so it is not surprising that these two famous cities are on it.

In the 18th century, New York and Boston were undoubtedly important port cities on the east coast of North America. Merchant ships traveling between Europe and North America would mostly arrive at these two cities. Therefore, there are several routes representing the routes from Europe to North America on this hand-drawn nautical map.

In addition, there are routes that extend south from New York and Boston, obviously, to the Caribbean.

There are also some routes that extend northward from these two cities. These routes go north along the east coast of North America, passing Prince Edward Island and Newfoundland, then turn east, cross the North Atlantic to reach Europe. This is the North Atlantic route.

In fact, there were already several routes across the North Atlantic in the 18th century. Although the North Atlantic has strong waves, it is the shortest route from Europe to North America, so many routes from Europe to North America in the 18th and 19th centuries took the North Atlantic.

For example, the most famous Titanic took the North Atlantic route on its maiden voyage. However, the ship was so unlucky that it encountered an iceberg on the way and sank directly in the North Atlantic sea more than 4,000 meters deep.

All of these routes seem to be fine, except for the one that starts from Boston and goes north. After arriving at Newfoundland, it does not turn east but continues north along the east coast of North America, passing through the Labrador Sea and the Davis Strait.

That route ended after reaching Davis Strait.

Although the specific destination of this route is unknown, it is really strange.

You know, even in modern times when the shipping industry is extremely developed, apart from some fixed routes and scientific research ships, there are very few commercial ships that take this Arctic route, not to mention the era of sailing ships in the 18th century.

In those days, it was not a big deal if you traveled through the Davis Strait in the summer, but traveling there in the spring, autumn, or winter was simply seeking death.

But why does such a strange route appear on this nautical chart?

What Yang Jing couldn't understand the most was that by the 18th century, the navies of European powers had basically begun to use special paper to draw nautical charts. The hand-painted sheepskin nautical charts were almost extinct for the navies of European powers.

In that era, the only ones who still insisted on using sheepskin to draw nautical charts, apart from a very small number of private merchant ships, were the pirates who roamed the world...

PS: I would like to thank "Ice Octave" and "Flame Tianhuang" for their 100 rewards.