In the tank with the manatee were some flounders. Roy was amazed to note that they were almost white, like the sand in the bottom of the tank. He had often seen flounders, but never any of that color. It puzzled him until he remembered that the flounder, like many another creature, possesses the power of protective coloring. Roy wondered how it was possible for any creature to change its color to match its environment. But, like many a wiser person, he pondered over the matter in vain.

When he had grown tired of watching the sea-cow and the white flounders, he walked over to the ring of tanks, and, beginning at one side of the entrance, walked slowly around the building. Never had Roy dreamed that there could be such fishes as he now beheld. Not only did he find the familiar fishes of our own waters that he had caught or seen for sale in the markets, but also he saw strange and curious creatures from every part of the world. What astonished him most was the vivid coloring of some of the fishes from the tropics. Roy had often seen parrots and other tropic birds, and he knew that the birds in these hot regions were more brilliant in hue than our own birds. But he had never dreamed that the fishes would likewise be gaily colored. Yet here he beheld fishes of red and green and blue and yellow, as brilliant in color as any parrot or parrakeet he had ever seen.

When he had become tired of looking at fishes, Roy left the aquarium and again sought a shady seat. As he opened his book his glance rested on the words “Fort Amsterdam.”

“I wonder how many forts those old fellows had, anyway,” thought Roy. “I’ll just see what it says about Fort Amsterdam,” and he began to read: “Before the first great fire visited Manhattan in 1626, the lines of a fort were laid out, occupying the site of the present Custom House, the work being completed between 1633 and 1635. Fort Amsterdam, as the work was called, was built of earth and stone and had four bastions. It rose proudly above the group of small houses and became the distinctive feature of New Amsterdam. The main gate of the fort opened on the present Bowling Green, which from the earliest days was maintained as an open space. It was, in fact, the heart of the Dutch town. It provided a playground for the children, a site for the May-pole around which the youths and maidens danced, a parade-ground for the soldiers, and a place for the market and annual cattle show. Here also were held those great meetings with the Indians, at which treaties were arranged and the pipe of peace was smoked. In 1732 it was leased to three citizens who lived close at hand, for one peppercorn a year, as a private bowling ground, from which fact it takes its name.”

“Think of that,” mused Roy. “They used to smoke the peace-pipe there. Now the place is surrounded by sky-scrapers, trolley-cars run past it, subway trains rumble underneath it, and elevated trains thunder by within a few feet. I wonder what those Indians would think if they could ever come back to earth and see Manhattan Island now.” Roy chuckled at the idea, but when he thought of the Dutch cattle shows he laughed outright. “Wouldn’t a herd of cattle tethered in Bowling Green create a sensation now?” he said to himself. “I must take a look at that place.”

He jumped up and crossed the park, heading for the Custom-house at the eastern end. This was a huge building, some seven stories in height, that covered an entire block. Roy walked around it, pausing finally to admire the groups of beautiful statuary that adorned the front of the building. For a long time Roy gazed at the Custom-house, and the longer he looked the more beautiful he thought the building was.

He had often seen it on his previous visit, but he had been so preoccupied then that he had given little thought to it or any other building. Though he had learned well the geography of the city, in order that he might get about with facility, he had learned nothing of the history or meaning of New York. Now that he was looking at things from a new point of view, it seemed as though he had never seen them before. It was so with Bowling Green. Often he had passed the little fenced-in oval of grass, with its few benches and a tree or two, but it had been to him only a tiny bit of green. It had held no meaning. Now in fancy he saw the old fort with its little parade-ground, its gates open, and the Dutch soldiers marching out to drill. He pictured the boys and girls frolicking about the May-pole. And when he thought of the cattle shows, he laughed again.

Roy went into the tiny oval and sat down on a bench to think this all over. “It was almost three hundred years ago,” he mused, “when they built that old fort. That’s a long time. It’s so long that I suppose there isn’t a thing left that was standing in those days. That’s funny, too, for I’ve read that in England there are buildings hundreds and hundreds of years old. I wonder what’s the oldest thing here.”

Roy looked about but could find nothing that he thought seemed very old. “That’s the queer thing about New York,” was his comment. “There never has been much in it that is old. They keep tearing things down and building new things in their places all the time. No wonder they say that New York will never be finished. There isn’t anything old here.”

But Roy was mistaken, and when he fell to reading in his guide-book again he discovered it. For the fence that surrounded the little oval was almost a century and a half old. “This fence,” Roy read, “was imported from England in 1771 to enclose a lead equestrian statue of George III. On the posts were the royal insignia. In 1776, during the Revolution, the lead statue was dragged down and moulded into bullets by the colonists, and the royal insignia were knocked from the tops of the posts. The fractures can still be seen.”