“It is enamel over silver,” Djaro explained. “You thought it would be all silver? No, it is black enamel with specks of gold. The eyes are small rubies. But it is not the genuine silver spider of Varania. That is far superior to this one.”

The jeweled spider looked like a first-class job to the boys, but they accepted Djaro’s word for it. They studied it from all angles so they could recognize the original if they had the luck to find it.

“The real one was taken last week, and this imitation left in its place,” Djaro said bitterly. “I suspect the only man who could have done it — Duke Stefan. But I cannot speak without proof. The political situation is very delicate. All the members of the Supreme Council are Stefan’s men. Until I am crowned I have little power, and they do not want me crowned. The theft of the royal spider is the first step to prevent me from taking my place as ruler.

“But I cannot bore you with so many details. Besides, I have to go to a meeting myself. I will take you back outside and leave you. There is a car and a driver ready — you can go sightseeing in the city. I will see you tonight, after dinner, and we will talk again.”

He led them out of the jewel vault, locking all the doors. Once outside the relic room he shook their hands, and told them where to find the car that was waiting.

“The driver’s name is Rudy,” he said. “He is faithful to me. I would like to go with you,” he added wistfully. “Being a prince is often dull. But I must be what I am. Enjoy yourselves and we will talk tonight.”

He walked rapidly away down the corridor.

Bob scratched his head. “What do you think, Jupe?” he asked. “Can we find Djaro’s royal spider for him?”

Jupiter sighed. “I don’t see how,” he said. “Not unless we have an awful lot of luck.”

THE THREE INVESTIGATORS enjoyed their drive through the capital city of Varania. To boys who had been brought up in California, where everything was relatively new, Varania was unbelievably old. Even the apartment houses were made of stone, or else a kind of yellow brick. Many of the roofs were of red slate, and there were squares and fountains every block or so. Flocks of pigeons strutted everywhere — especially in front of St. Dominic’s cathedral.

Their car was an ancient open touring car, and their driver a young man in a smart uniform who spoke English well. His name was Rudy, and he informed them in a low voice that they could trust him, that he was loyal to Prince Djaro.

They drove into the hills outside Denzo to see the view of the river from the heights. As they were climbing back into the car after taking some pictures, Rudy spoke in a low tone.

“We are being followed,” he said. “We have been followed ever since we left the palace. I am going to drive you to the park now, and you may walk through it and watch the entertainers. But don’t look back. Don’t let them know they’ve been spotted!”

Not look back! It was a hard order to obey. Who was following them? And why?

“I wish I knew more about what’s going on,” Pete grumbled as they drove back through the colourful streets. “Why would anybody follow us? We don’t know anything!”

“Someone may think we do,” Jupiter suggested.

“Someone wishes we did,” Bob added. “Me.”

Rudy pulled the car to a stop. They had reached a large, tree-covered square where many people were strolling. Faintly they could hear the sound of music.

“This is our main park,” Rudy said, leaping out to open the door for them. “Walk slowly to the center, past the bandstand. When you reach the entertainers, the tumblers and clowns, take some pictures. Then ask the girl who sells balloons to let you take her picture. She is my sister, Elena. I will wait here for you until you get back. Oh, and don’t look behind you. You’ll probably be followed but you don’t need to be worried. At least not yet.”

“At least not yet!” Pete said as they walked slowly beneath the trees in the direction of the music. “Well, that gives us something to look forward to.”

“How can we possibly help Djaro?” Bob wanted to know. “It’s all a wild goose chase. We can’t do anything.”

“We have to wait for developments,” Jupiter said. “My guess is we’re being followed to see if we contact anyone. Bert Young, for instance.”

They walked on a little further and came to an open area where many people were sitting on the grass. On a tiny bandstand a band of eight men in brilliant uniforms tootled loudly. They finished and everyone applauded. As if this was a signal to try even harder, the band immediately started another tune.

The Three Investigators circled around the bandstand and kept walking. There were many people strolling along the paths so they could not tell if they were being followed.

Presently they came to a wide paved area.

Here were the entertainers Rudy had mentioned. A trampoline had been set up and two tumblers were doing fantastic leaps and somersaults on it. A couple of clowns did flip-flops on the ground among the passers-by, holding out little baskets into which most of the strollers good-naturedly dropped a coin.

A very attractive girl in a native peasant costume stood nearby with a huge bunch of balloons. As she sold them she sang a song in English about buying a balloon to set it free, so it could carry your wishes up to the sky. Many people did buy balloons and set them free, and they shot upward, colorful globes of red and yellow and blue, until they disappeared.

“Take pictures of the clowns, Pete,” Jupiter directed. “I’ll get some shots of the acrobats. Bob, you just sort of look around to see if you notice anything.”

“Right, First.” Pete walked over in the direction of a tumbling clown.

Jupiter, with Bob at his elbow, opened his camera and focused it on the tumblers. He fussed with it, seeming to have trouble. Actually, he was pressing down the lever that activated the powerful walkie-talkie.

“First here,” he said in a low voice. “Do you read me?”

“Coming in loud and clear,” Bert Young’s voice murmured back from the camera. “What’s the situation?”

“We’re sightseeing,” Jupiter said. “Prince Djaro has asked us to help him recover the royal spider of Varania. It has been stolen and a substitute left in its place.”

“Uh-oh!” Bert Young exclaimed. “That’s worse than I thought. Can you help him?”

“I don’t see how,” Jupe admitted.

“Neither do I,” Bert Young agreed. “But stay with it and keep your eyes open. Anything else?”

“We’re in the park and we’ve probably been followed. We don’t know by whom.”

“Try to get a look at them. Report back to me later, but wait until you’re alone. Someone may get suspicious if you talk now.”

With that Bert Young broke off. Jupiter took his pictures, while Bob looked slowly all around. Seeing nothing — that is, no one who looked like he was shadowing them — he dropped some American coins into a clown’s basket.

Now the clowns led out a French poodle, who did somersaults and stood on his front legs. The crowd gathered around to watch, leaving the balloon girl free for the moment.

“Now we take a picture of the girl,” Jupiter murmured to the others. They all moved over, Jupiter focusing his camera. The girl saw him, smiled, and posed. Jupiter snapped the picture. Then the girl came forward with her balloons.

“Buy a balloon, young American gentlemen?” she said. “Set it free, let it soar into the clouds and take your wish up to heaven.”

Pete found some American money and gave it to her. She handed each of them a balloon and then turned to the task of making change. As she bent over the coins, she whispered beneath her breath.

“You are being followed. A man and a woman. They do not look dangerous. I think they want to talk to you. Sit down at a table over there and order ice cream. Give them a chance to talk to you.”