"Then please fast-forward until the waiter arrives with the trolley."
Mercier did as he was told. At five minutes before ten the waiter appeared in the corridor, pushing a trolley. He knocked on the door, then knocked again.
"What is the hotel policy if the guest does not open his door?" asked Inspector Zhang.
"If the 'Do Not Disturb' sign is on then the member of staff will phone through to the room. If it isn’t then it’s acceptable to use their key."
The waiter knocked again, then used his key card to open the door. Inspector Zhang made a note of the time. It was nine-fifty eight.
"And at what time did the waiter call down to reception to say that he had found Mr. Wilkinson dead on the bed?"
"Just before ten," said Mercier. "You’ll have to ask Miss Berghuis. She’ll know for sure."
They watched the screen. After a minute or so the waiter appeared at the doorway. He stood there, shaking, his arms folded, then he paced back and forth across the corridor. The time code showed 10.03 when Miss Berghuis appeared, followed by her staff. They hurried into the room.
Mercier pressed a button to freeze the screen and pointed at the time code. "Three minutes past ten," he said. "No one went in or out of the room except for Mr. Wilkinson and his guest. His guest left at nine-thirty and the next time he was seen, he was dead."
Inspector Zhang nodded thoughtfully as he put away his notebook. "So, please, let us go back to the room. I have seen everything that I need to see."
They went back to the sixth floor. Two uniformed police officers had arrived and were standing guard at the door to the suite. They nodded and moved aside to allow the inspector and Mercier inside.
Sergeant Lee was scribbling in her notebook and she looked up as Inspector Zhang walked into the room. "I have everyone’s details, Sir," she said.
"Excellent," said the inspector, striding towards the bedroom. "Come with me please, Sergeant Lee. Everyone else please remain where you are. I shall return shortly."
Sergeant Lee followed the inspector into the bedroom and he closed the door behind them and then looked at her, barely able to control his excitement. "Do you know what we have here, Sergeant Lee?"
The Sergeant looked at the body on the bed. "A murder, sir?"
Inspector Zhang sighed. "Oh, it’s much more than that, Sergeant. What we have here is a locked room mystery."
The Sergeant shrugged, but didn’t say anything.
"Do you know how long I’ve waited for a locked room mystery, Sergeant Lee?"
She shrugged again. "No, Sir."
"My whole life," said Inspector Zhang, answering his own question. "We have no unsolved murders in Singapore, and precious few mysteries." He sighed. "At times like this I wish I had a deerstalker hat and a pipe."
"Smoking isn’t permitted in public buildings, Inspector," said Sergeant Lee.
"I know that," said Inspector Zhang. "I’m simply saying that a pipe would add to the effect, as would a faithful bloodhound, tugging at its leash."
"And hotels in Singapore do not allow pets, Sir," said Sergeant Lee.
Inspector Zhang sighed mournfully. "You’re missing the point," he said. "The point is that that we have a dead body in a room that was locked from the inside. A room that no one entered during the time that the victim was murdered. Sergeant Lee, we have a mystery that needs to be solved."
"Shall I notify the forensics department, inspector?" asked Sergeant Lee.
"Forensics?" repeated Inspector Zhang. "Have you no soul, Sergeant Lee? This is not a mystery to be solved by science." He tapped the side of his head. "Zis is a matter for ze little grey cells." It wasn’t a great Poirot impression, but Inspector Zhang thought it satisfactory. Sergeant Lee just found it confusing and she frowned like a baby about to burst into tears. "Let me look around first, then we’ll decide whether or not we need forensics," added Inspector Zhang, in his normal voice.
"Sir, that is not procedure," said Sergeant Lee.
"Indeed it is not, but we shall inform them in due course. However, I would first like to examine the crime scene." He turned to look at the body. "So what do we have?" mused Inspector Zhang. "We have a dead body on a bed. We have a wound, but no weapon. We have a room that was locked from the inside. We have sealed windows and no way in and out other than through a door into a corridor that is constantly monitored by CCTV." He shivered. "Oh, Sergeant Lee, do you not appreciate the beauty of this situation?"
"A man is dead, Inspector Zhang."
"Yes, exactly. He is dead and somewhere there is a killer and it is up to me to find that killer." He looked over her and smiled like a benevolent uncle. "For us to solve," he said, correcting himself. "You will be Watson to my Holmes, Lewis to my Morse."
"Robin to your Batman?" suggested Sergeant Lee.
Inspector Zhang peered at her through his thick-lensed spectacles as he tried to work out if she was mocking him, but she was smiling without guile and so he nodded slowly. "Yes, perhaps," he said. "But without the masks and capes. You know that Batman made his first appearance in Detective Comics way back in 1939?"
"I didn’t know that," said the Sergeant, scribbling in her notebook.
"And that he is sometimes referred to as the World's Greatest Detective, which I always considered to be hyperbole."
Sergeant Lee continued to scribble in her notebook. "What are you writing, Sergeant Lee?" he asked.
She blushed. "Nothing," she said, and put her notebook away.
Inspector Zhang nodded slowly and walked slowly around the room. "I assume you are not familiar with the work of John Dickson Carr?" he said.
Sergeant Lee shook her head.
"He was a great American writer who wrote dozens of detective stories and most of them were locked room mysteries. He created a hero called Dr. Gideon Fell, and it was Dr. Fell who solved the crimes."
Sergeant Lee tapped the side of her head. "By using ze little grey cells," she said, in a halfway passable French accent.
Inspector Zhang smiled. "Exactly," he said. "Now, in his book 'The Hollow Man', itself a locked room mystery, John Dickson Carr used Dr. Fell to expound his seven explanations that lead to a locked room murder." He nodded at his Sergeant. "You might want to make a note of them, Sergeant Lee," he said. "Now come with me." They went back into the sitting room. Miss Berghuis was sitting on the sofa next to Mercier. The waiter was standing close to the door as if he was keen to get out of the suite as quickly as possible. The two assistant managers stood by the desk in the corner of the room, looking at each other nervously.
Inspector Zhang walked to the window and stood with his back to it. "So, I have now examined the CCTV footage covering the corridor outside this room, and I have examined the crime scene." Sergeant Lee fumbled for her notebook as Inspector Zhang continued. "The CCTV footage shows that Mr. Wilkinson arrived at his room with a guest at eight-thirty and that his guest, a young woman who is known to the police, left exactly one hour later. What I need to know is when Mr. Wilkinson ordered from room service."
"That will be on the bill, inspector," said Miss Berghuis. She went over to the trolley and picked up a small leather folder and took out a slip of paper. She studied it, and nodded. "The order was placed at nine thirty-six," she said.
"Excellent," said the inspector. "So from that we can assume that Mr. Wilkinson was killed sometime between the placing of the order at nine thirty-six and the arrival of the order at nine fifty-five." He frowned. "That does seem remarkably quick, Miss Berghuis."
The manager smiled. "Inspector, we are a five-star hotel. And Mr. Wilkinson ordered only a club sandwich and a pot of coffee. Hardly a challenge for our chefs."
"Very good," said the inspector, as Miss Berghuis went back to sit on the sofa. "We can therefore rule out Mr. Wilkinson's guest as the killer, as we know for sure that he was still alive at nine thirty-six."
Miss Xue nervously raised her hand. "Actually, Inspector, we know that he was alive after that because he spoke to his wife at about a quarter to ten," she said.
"How so?" asked Inspector Zhang.
"She phoned at nine forty-five," said Miss Xue. "I was on the desk and I was there when the call came through from America. Mrs. Wilkinson was on the phone to her husband for almost five minutes."