Zhang had seen them discover the piece of paper, and glanced at it stealthily. But he was disappointed to find it was covered in Muslim writing, which he could not understand.
Chen knew something of the Muslim written language, but he could not grasp the meaning of the classical characters on the piece of paper and handed it over to Huo Qingtong. She examined it closely for a long time, then folded it up and placed it in her pocket.
"What does it say?" Chen asked. Huo Qingtong did not answer, her head hung low.
Princess Fragrance knew her sister well and smiled. "She is trying to work out a difficult problem. Don't disturb her," she said.
Huo Qingtong sat down on the ground and began to draw lines in the sand with her finger. She drew a diagram then rubbed it out and drew another. After a while, she wrapped her arms around her knees, deep in thought.
"You are still weak. Don't overtax yourself," Chen said to her. "You can work it out later. The important thing now is to think of a plan for getting out of here."
"I'm working on a way to escape these hungry wolves and these human wolves as well," Huo Qingtong replied, pouting angrily at Zhang as she spoke. She continued her meditations for a moment, then said to Chen: "Please stand on a horse and look westwards. Tell me if you can see a mountain with a white peak."
Chen led the white horse over and did as she said. In the distance, he spied a cluster of mountains, but could see none with a white peak. He searched carefully for a minute longer then looked down at Huo Qingtong and shook his head.
"According to the map, the Secret City should not be far from here, and we should be able to see the White Jade Peak."
Chen jumped off the horse's back. "What secret city?" he asked.
"When I was young, I heard people talk about an ancient city that was buried in this desert," she replied. "The city was once extremely prosperous, but one day a great sand storm arose, and dunes as large as mountains buried it. None of the city's residents escaped." She turned to Princess Fragrance. "Sister, you know the story better than I do. You tell it."
"There are many stories about the place, but no one has ever seen the city with their own eyes. No," she corrected herself. "Many people have been there, but few have returned alive. It is said that there are huge amounts of gold, silver and jewels there. Some people who have lost their way in the desert have found their way into the city by chance and have been overwhelmed by the sight of such wealth. They naturally began to load the gold and jewels onto their camels to take away with them. But no matter which way they went, they found it impossible to get out of the city.
"Why?" Chen asked.
"It's said that all the people of the city turned into ghosts when they were buried by the sand, and that they bewitch visitors who try to take valuables away with them. But if you put down the valuables, every single piece, then it's easy to find your way out."
"I doubt if many people would be willing to do that," said Chen.
"Yes. Seeing such riches, who wouldn't want to take some? It is said that if you don't take anything, but even leave a few extra taels of silver in one of the houses, then the wells will spurt clear, fresh water for you to drink. The more silver you leave, the more fresh water there is."
Chen laughed. "The ghosts of this secret city sound very greedy."
"Some members of our tribe who were badly in debt have gone to look for the city, but only those who didn't find it have ever come back," Princess Fragrance continued. "Once, a caravan crossing the desert came across a man who was half dead. He said he had entered the city, but had found himself going in circles when he tried to get out again. Finally, his strength gave out and he collapsed, and the next thing he knew was the arrival of the caravan. The caravan leader asked him to lead them to the city, but he refused. He said he wouldn't take one step into that haunted place again even if he received all the riches of the city as a reward."
"It doesn't necessarily have to be that these people were bewitched by ghosts," said Chen. "If someone suddenly came upon a huge amount of gold and jewels, it could affect their minds and make it difficult for them to think clearly. But if they decided they did not want the riches, it could clear their heads, and make it easier to find the way out."
"The map hidden in the scabbard shows the way to the Secret City," Huo Qingtong said quietly.
"Ah," exclaimed Chen, suddenly understanding.
"The map indicates that the city was built around a high snow-capped mountain." she continued. "From the look of it, the mountain should not be too far from here. We should be able to see it. I cannot understand why we can't."
"Sister, you're wasting your time," said Princess Fragrance. "Even if we could find the mountain, what use would it be?"
"We could escape into the city. There are houses and fortresses in the city and our chance of escaping the wolves would be much greater than here."
"That's right!" Chen said. He stood on the horse's back once more looking west. But all he could see was a hazy white sky stretching to the horizon.
Zhang and the Three Devils could not understand a word of what they said, but they watched suspiciously as Chen stood on the back of his horse twice, and wondered what devilment he was up to.
Princess Fragrance took out some dry rations and divided them up amongst all of them. As she sat eating, she gazed out beyond the flames at the horizon. Suddenly, she jumped up.
"Sister! Look!" Huo Qingtong followed the direction of her hand and saw a black spot stationary in the sky.
"What is it?" she asked.
"It's an eagle," Princess Fragrance replied. "I saw it fly over from here. But how could it suddenly stop in mid-air?"
"Are you sure?"
"Yes, I clearly saw it fly across."
"If the black spot isn't an eagle, what could it be?" asked Chen. "If it is an eagle, how could it remain motionless in mid-air? It's very strange." The three watched the spot for a while, then saw it move and become larger. A black eagle swept over their heads.
Princess Fragrance raised her hand to tidy her hair, which had been blown about by the wind. Chen looked at her snow-white skin and the white material of her dress next to it and realised the answer.
"Look at her hand!" he said excitedly to Huo Qingtong.
"Yes, her hands are very pretty," she replied absent-mindedly.
"Of course her hands are beautiful. But don't you see? Because her skin is so white, it's difficult at a glance to tell where the hand begins and the dress ends."
"So?" asked Huo Qingtong, puzzled.
"The eagle was sitting on top of a white mountain!"
"Yes! You're right," Huo Qingtong exclaimed. "The sky over there is white, the same colour as the peak, so from a distance, it can't be seen."
"Exactly," said Chen.
Princess Fragrance realised they were talking about the Secret City. "How do we get there?" she asked.
"That is what we have to carefully work out," Huo Qingtong replied. She pulled out the map again and studied it carefully again for a while. "When the sun starts to sink towards the west, we'll be able to tell if there's a mountain there or not by its shadow."
"We mustn't give ourselves away," said Chen. "We don't want the others to work out what we're doing."
"Yes. Let's pretend we're talking about this wolf," she suggested.
Chen pulled the wolf across and the three sat around it, now pulling out one of its hairs and examine it closely, now opening its mouth to look at its teeth. The sun gradually sank towards the west and the mountain's shadow did indeed appear, stretching out longer and longer across the desert like some giant lying down. Huo Qingtong drew a map on the ground, estimating the distances.