Rudy and Dmitri shoved the manhole cover back into place. Then Dmitri started down the alley, ignoring the curious looks from the flower vendors. They had covered about fifty yards when he stopped abruptly. Ahead of them two palace guards in scarlet livery had turned the corner.

“Back!” Dmitri snapped. “Hide!”

But it was too late. They had been seen. Their wet clothing was clue enough to who they were, if any was needed. The guards raised a shout and started on the run for the little band of fugitives.

“Surrender!” they bawled. “In the name of the Regent, you’re under arrest.”

“You have to catch us first!” Dmitri shouted defiantly. He wheeled and made a sweeping motion with his arm. “Follow me!” he exclaimed. “We’ll make for the church. There’s a possibility — ”

The rest was lost. Already they were running after him, dodging around the people who got in their way. Behind them about a dozen guards pursued, but they were having a harder time getting through the curious flower vendors who had surged into the center of the narrow street.

“One side! One side!” the guards roared.

Above the rooftops of the ancient houses Bob could see the golden dome of St. Dominic’s. He was beginning to pant with exertion. What good would it do them to hide in the church, he wondered? It would just delay their being caught. But Dmitri seemed to have a plan in mind, and this was no time to ask questions.

Behind them one of the pursuing guards slipped and fell. Several of his companions stumbled over him and they made a pile in the street, helping the fugitives gain fifty yards. Bob wondered if the guard who had fallen had really had an accident. Perhaps he was a friend who was trying to help them.

They ducked around a corner and there, a block ahead of them, loomed the stately church. And there, also a block ahead of them, were more palace guards looking their way.

They could never make the door to the church!

But apparently Dmitri was not heading for the main entrance. He swerved across the street to a small side door at the rear of the cathedral. They dashed inside, and bolted the door just as their leading pursuers reached it. Angry fists began to pound on the stout wood.

Inside the church, Bob only had time for a fleeting impression of a large, square room that did not seem to have any ceiling. It went up and up as far as he could see. On one side was a flight of stairs closed in by heavy iron grillwork. Eight thick ropes hung down from above, their ends looped through iron rings set into the stone walls.

Bob had no time to see more.

“Now we make for the catacombs,” Dmitri was saying. “Do you lads know what catacombs are? They are burial regions concealed beneath the church. In ancient times people were buried there, and there are many levels, many corridors. We can hide there — ”

“What’s the use of hiding anymore?” Jupiter spoke up unexpectedly. “They’ll only catch us sooner or later.”

They all stared at him.

“You’re thinking something, Jupe!” Pete said tensely. “I can tell. What is it?”

“These ropes.” Jupe pointed. “Do they ring the bell of Prince Paul?”

“The bell of Prince Paul?” Rudy scowled, trying to fathom what Jupiter was leading up to. “No, these are the regular church bells. The bell of Prince Paul is in the other bell tower, across the church. It hangs all by itself, and rings only on state occasions.”

“Yes.” Jupiter spoke swiftly. “But Prince Djaro told us also that hundreds of years ago, when Prince Paul quelled the rebellion, he summoned his loyal followers to let them know he was not dead by ringing the bell.”

They all stared at him. Dmitri rubbed his jaw.

“Yes,” he said. “Every schoolchild knows the story. It is part of our national heritage. But what are you thinking?”

“He means that if we ring the bell of Prince Paul now, maybe the people will rise to Prince Djaro’s aid!” Rudy cried. “We never thought of it — to us it is just an old story that happened long ago. All we could think of was newspapers, or the radio, or television. But just suppose if, today — ”

“The bell started ringing!” Elena chimed in, tremendously excited. “And after all those radio announcements of an important message to come. The people love Prince Djaro. If they thought he was in trouble and needed them, they’d flock to his aid.”

“But if — ” Dmitri began.

“There’s no time for ifs!” Rudy cried. “Listen to them hammer on that door. We only have moments.”

“Very well.” Dmitri no longer hesitated. By now guards were probably racing around to the main entrance also. “Rudy, you lead them. Elena and I will go the other way, down to the catacombs. If they follow us, you’ll gain time. Elena, we need something for them to find. Give me one of your shoes.”

Elena stooped and wrenched off a wet shoe. She handed it to him.

“I’ll leave it behind like Cinderella,” she said, and even managed a smile. “Go, Rudy, hurry!”

“This way!” Rudy said. “Follow me!”

He ran across the cathedral to the bell tower on the other side. Bob, Pete and Jupiter followed him. Elena and Dmitri hurried toward a rear door, which presumably led to the catacombs.

Bob found himself falling behind. He was limping now. His leg, which until recently had worn a brace to strengthen it following a bad break, was beginning to pain him after so much exertion.

Ahead of him he saw the others stop. Limping more with each step, he caught up with them and saw that they were in another room similar to the one they had left. This, too, had no ceiling. A single sturdy rope hung down from above and was secured to the wall. Stairs, enclosed like the others in iron grillwork, led upward.

Rudy swiftly undid the bell rope so it hung free. Then he ran for the stairs.

“Come!” he called. “Up! Swiftly!”

Pete grabbed Bob’s arm to help him, and they began to scramble frantically up the stone steps.

THE STONE STAIRS were steep. For Bob each one was an effort. Rudy saw his difficulty and stopped. He handed one end of the blanket rope to Bob.

“Hang on!” he cried. “I’ll give you some help.”

Grasping the rope as Rudy pulled, Bob found the going easier. They went up one flight, two. As yet the guards had not found their trail. At the top of the third flight they came to a massive gate closing off the stairs. It opened with a creaking protest when pushed.

When they were through, Rudy put into place an enormous iron bolt.

“That’s to hold off pursuers,” he said. “In the old days, even the church might be invaded by soldiers. The priests could retreat to the bell towers, locking these gates behind them. There are two more.”

They had, just locked the second gate when the guards came pouring into the base of the bell tower. They looked up, saw the fugitives, and began to race up the stairs. But the first locked gate stopped them.

They shook it without effect, and bawled orders for tools to cut through the iron bars.

“They won’t get through in a hurry,” Jupiter puffed, as they hurried on. “We’ll have a little time, anyway.”

Now they were above the dome of St. Dominic’s. They could see miniature people and tiny cars moving on the streets below. Everything was normal, it seemed. Except here, in the bell tower. Here was warfare and an enemy they had to outwit.

They reached the open bell-chamber, where the great bell of Prince Paul hung from massive timbers beneath a pointed roof. Here was the third gate. They slammed it shut and Rudy bolted it. A flock of pigeons, frightened by the noise, flapped away from their roosts on the ledges of the tower.

The boys paused to get their breath. Down below, the guards were attacking the first bolted gate with a great deal of noise and confusion, but no apparent progress.