'I did not leave there right away,' Ma Joong answered, 'but stayed on for a friendly round of gambling and let them win about fifty cash. I observed that Sheng Pa and his friends practise a few tricks, familiar to me through the kind lessons of our friend Tap Gan here! Since I wanted to create a cordial atmosphere I pretended not to notice anything.

'Thereafter we engaged in a desultory conversation and they told me all kinds of horrifying tales about that Temple of Transcendental Wisdom. You must know that I happened to ask Sheng Pa why he and his men lived in those miserable shacks in front, while by secretly forcing a side door of the temple they could find a comfortable shelter against wind and rain within, using the cells vacated by the monks.'

'I had been wondering about that too!' Tao Gan observed.

'Well,' Ma Joong continued, ' Sheng Pa told me that they would certainly have done so, were it not for the fact that the temple is haunted. Late at night they often hear groans and the clanking of chains behind those sealed doors. One of the men once saw a window open and a devil with green hair and red eyes scowled at him. Now you can believe me when I say that Sheng Pa and his gang are tough customers, but they don't like getting involved with ghosts and goblins!'

'What a gruesome tale!' Tao Gan said. 'Why did the monks leave the temple? It is usually not so easy to make that lazy crowd leave a place once they are settled comfortably. Do you think they were chased out by devils or malignant foxes?'

'I don't know about that,' Ma Joong said, 'I only know that the monks just left there and went Heaven knows where.'

Thereupon the sergeant told a hair-raising story about a man who married a nice young girl. She later turned out to be a fox-spirit and bit through her husband's throat.

When he had finished, Ma Joong observed:

'All this talk about ghosts gives me a strong desire for something better to drink than tea!'

'Well,' Tao Gan said, 'that reminds me! Near Lin Fan's mansion I bought some pickled nuts and salted vegetables, in order to get into conversation with the greengrocer. I dare say that those would go well with a cup of wine!'

'Now this is a Heaven-sent opportunity,' Ma Joong declared, 'to get rid of that money you filched in the Temple of Boundless Mercy! You know that money stolen in a temple brings bad luck if you dare to keep it!'

For once Tao Gan made no objections. He sent a sleepy servant out to buy three pints of good local wine. When it had been warmed on the tea stove they had many a round and did not retire till after the hour of midnight.

Early the next morning the three friends met again in the chancery of the tribunal.

Sergeant Hoong went to inspect the jail. Tao Gan disappeared into the archives to search for documents relating to Lin Fan and his activities in Poo-yang.

Ma Joong walked over to the quarters of the guards, and when he saw that the constables were loafing there, while the guards and the runners were gambling, he ordered them all to assemble in the main courtyard. To their great dismay he put them for two hours through a stiff military drill.

Then he had luncheon with Sergeant Hoong and Tao Gan, and returned to his own quarters for a good afternoon nap. He expected to have quite a strenuous evening.

When night had fallen, Ma Joong once more donned his disguise. Sergeant Hoong had authorised the comptroller to issue him thirty silver pieces from the coffers of the tribunal. Having wrapped these in a piece of cloth, Ma Joong put the package in his sleeve. Then he set out again for the Temple of Transcendental Wisdom.

He found Sheng Pa in his usual place, sitting with his back against the wall, scratching his naked torso. He seemed completely absorbed in the gambling.

But when he saw Ma Joong he greeted him cordially and bade him sit down by his side. When Ma Joong had squatted he spoke:

'I thought, brother, that by now you would have invested the copper cash you won from me the other night in buying yourself a nice jacket. What will you do when winter comes and you find yourself unprotected?' Sheng Pa gave him a reproachful look. 'Brother,' he said, 'your language is offensive to me. Did I not tell you that I am a counsellor of the Beggars' Guild? Far be it from me ever to obtain a piece of clothing through a mercenary procedure so odious to me as buying. However, let us get to the business on hand.'

Bringing his head close to Ma Joong's ear, he continued in a hoarse whisper:

'Everything has been arranged! Tonight you will be able to leave the city. The fellow who wants to sell a golden hairpin for thirty silver pieces is a vagrant Taoist mendicant monk.

He will be waiting for you tonight in Wang Loo's tea house, behind the Drum Tower. You will easily recognise him, he said he will be sitting all by himself at a table in a corner. There will be two empty cups under the spout of the teapot in front of him. You are supposed to identify yourself by commenting on those tea cups. The rest is up to you.'

Ma Joong thanked him profusely and promised that when he revisited Poo-yang, he would come to pay his respects without fail. Then he took a hurried leave.

He strode briskly to the Temple of the War God. He saw the Drum Tower silhouetted against the evening sky. A street urchin guided him to a small but busy shopping centre directly behind the tower. He glanced down the bustling street and found Wang Loo's signboard without difficulty.

He pulled aside the dirty door curtain. A dozen or so people were crowded around rickety tea tables. Most of them were clad in rags and a nauseating smell enveloped the place. He spotted a monk sitting alone at a table in the corner farthest from the door.

As he approached him Ma Joong was assailed by doubt. The waiting man was indeed clad in a ragged Taoist cowl. His head was covered by a greasy, black Taoist cap, and a wooden hand-gong hung from his girdle. But far from being tall and muscular, this man was short and fat. Even though he looked sufficiently disreputable with his dirty, sagging face, he definitely was not the type of violent rogue Judge Dee had described. Yet there could hardly be a mistake about this being his man.

Ma Joong sidled up to the table and said casually:

'Brother, since there are two empty tea cups I wonder whether I could sit down with you and moisten my parched throat!'

'Ha,' grunted the fat man, 'here you are, my disciple! Sit down and have a cup of tea. Have you brought the holy book with you?'

Before sitting down Ma Joong stretched out his left arm and let the other feel the package in his sleeve. The stranger's nimble fingers quickly identified the shape of silver pieces. He nodded and poured Ma Joong a cup of tea.

After they had taken a few sips, the fat man said:

'Now I shall show you the passage where the doctrine of the Supreme Void is most lucidly explained.'

As he spoke he produced a dirty volume from his bosom. Ma Joong took the thick, dog-eared book and noted the title was Secret Tradition of the Jade Emperor, a famous Taoist classic.

Ma Joong leafed through the book but failed to see anything out of the ordinary.

'I want you to read,' the monk said with a sly smile, 'the tenth chapter.'

Ma Joong found the place and raised the book nearer to his eyes as if to see better. A long golden hairpin had been inserted in the heart of the book, alongside the spine. The head of the pin consisted of the figure of a flying swallow exactly like the sketch that the judge had shown him. Ma Joong noticed the superb workmanship of the pin.