“I don’t know. She’s an aging cripple in a wheelchair. She can’t speak in much more than a whisper. And what could she tell him? That she’s a woman who returned to Islam after her husband’s death, whose son also discovered the faith and lightened her grief. Wouldn’t you, as her imam, agree with all this?”

“Of course.”

“Exactly, and you are a man of impeccable background and highly respected. Whatever has happened to the son has no connection with you. You’re too important, Ali, that’s why we keep you out of it. You even sat on a committee at the House of Commons last week. Nothing could be more respectable. No, my friend, you’re a real asset.”

“And too valuable to lose,” Selim said. “And loose ends are loose ends. If Mrs. Morgan should happen to mention you and me in the same breath, they’ll discover who you are. The man who is Belov’s security.”

Ashimov sighed. “All right, leave it to me. Now we better split up. I’ll be in touch.”

Selim hesitated. “Morgan was a soldier of God. If worse has come to the worst, he is also a true martyr.”

“Save that tripe for the young fools at the mosque, your Wrath of Allah fanatics. Go on, get going.”

Selim went, and Ashimov stayed there thinking about it. Perhaps Selim had a point. After all, why would Bernstein and Dillon be calling on the old lady at all? Better to be safe than sorry. He looked over at the incoming tide, then pulled up his collar against the rain, walked around to Chandler Street and rang the bell at number thirteen.

She answered it after a while and peered out over the chain. “It’s me. Mr. Ashimov,” he said. “Dr. Selim’s friend. He asked me to call and see if you wanted to go to the mosque.”

“That is kind,” she said. “I was going to go a little later.”

“Since I’m here, why don’t you go now? It’s much easier if I push you,” he said. “Bring an umbrella. It’s raining.”

She closed the door, undid the chain and opened it again and Ashimov stepped in. “Let me help you.” He reached for a raincoat and a beret hanging on a hall stand and helped her. “There you are, and here’s an umbrella.” He took one down and gave it to her.

“So kind,” she said.

“Not at all. Have you got your key?”

“Yes.”

“You had a visit this afternoon, I believe. A lady from the Welfare Department?”

“Did I?” She frowned. “I can’t remember.”

“Yes, with a gentleman. What did they ask you? About your son in New York?”

She was confused and bewildered. Few things seemed real to her anymore, and her memory was fading fast these days.

“I can’t remember. I can’t remember anyone calling.”

Which was true, for she was in the early stages of Alzheimer’s. It was obvious to Ashimov that he was wasting his time.

“Never mind. Let’s be on our way, then.”

The rain was driving down, no one around as they went along the street, the fog drifting up from the river. They went past the shop, which now showed a closed sign inside the door.

“It’s going to be a dirty night later,” he said.

“I think you’re right.”

“But still a nice view of the Thames.” He turned in at the old wooden jetty, the wheels of her chair trembling over the warped wooden boarding.

“There you are.” He paused at the top of the steps going down to the river.

“I like it at night with the lights on the boats.”

Her voice was like a small wind through the trees on a dark evening, as he looked at the river high with water lapping at the bottom of the steps. Then he shoved the chair forward. Strangely enough, she didn’t call out, but gripped the arms of her chair tightly, and when she hit the water, she went under instantly as the chair emptied her out.

It was only four or five feet deep, a mud bank when the tide was out. Someone would find her soon enough. He’d done her a favor, really. He lit a cigarette and walked away.

A few minutes later, standing in a doorway, he phoned Ali Selim. “You can relax. Mrs. Morgan has met with an unfortunate accident.”

“What are you talking about?” Ashimov told him. Selim sounded horrified. “Was that necessary?”

“Come on, Selim, you were the one talking about loose ends. Now, don’t forget, if the police inquire, you were unhappy about her habit of going to the mosque alone in her wheelchair, which is why you often sent young men to fetch her.”

Selim took a deep breath. “Of course.”

“She was prematurely aging, confused a great deal of the time.”

“She had Alzheimer’s.”

“Well, there you are. I’ll leave it with you,” and Ashimov hung up.

It was at ten the following morning that Patel, exercising his small terrier, found the body and the wheelchair on the beach. He called the Wapping police, and since Hannah had put a tracer on Mrs. Morgan, she was notified at once at the Ministry of Defence.

Ferguson was in a Defence Committee meeting, but Dillon was in the office and she quickly filled him in.

“So what do we do?” he demanded.

“Get down to Chandler Street fast and I’ll put a red flag on the case and take command. You come with me. You might be useful.”

They used a department limousine with a civilian driver, retired police. Hannah said, “It’s one hell of a coincidence.”

“And you know how much I believe in those.”

Just then, Dillon’s mobile rang. “Sean? It’s Roper. I’ve got something interesting for you on Ashimov and also on the Wrath of Allah thing.”

“Hold on to it for just a bit. Mrs. Morgan’s turned up on a mudflat at the end of her street, and Hannah and I are on our way. We’re just about there. I’ll call you later.”

They took a turn, and then there they were. There was a police paramedic’s ambulance, the usual team, and a sergeant in charge who jumped to attention when Hannah showed him her warrant card and assumed command.

“Not much of a scene of crime, ma’am,” he said. “Plenty of mud.” She and Dillon looked over the rail. “It’s obvious what happened. The gent who found her said she was always pushing herself in her wheelchair up and down the street to the Queen Street Mosque. Come off the pavement twice before in the past and ended up in the gutter.”

Hannah said, “Right. Get her up out of there and deliver her to Peel Street Morgue. I’m going to call in Professor George Langley. He’ll handle it.”

She walked away with her mobile and stood in a doorway. Dillon saw Patel lurking outside his shop and went over.

“This must have been a shock for you?”

“A terrible shock. It was a higher tide than usual last night. It’s amazing she wasn’t swept away.”

“Are you surprised by what happened?”

“Not really. She’d had a few close calls in that wheelchair and she was worse these days.”

“What do you mean, worse?”

“Couldn’t handle herself, confused, no memory worth speaking of. She didn’t know which way she was pointing. She was very upset when Henry went off to the States.” Patel hesitated. “What was it all about before, you and the Superintendent and those inquiries?”

Dillon lied glibly. “Her son was only on a special tourist visa, but seems to have gone missing, and we had a request to check it out. A lot of people do that. Go as tourists and fade into the landscape.”

“A lot of people do that here, too,” Patel said.

“The way of the world.”

Dillon went over to Hannah as she finished her call. “What next?”

“I’ve spoken to Langley, and he’s going straight to the morgue.” A couple of paramedics carried Mrs. Morgan past them in a body bag. “Poor old lady,” Hannah said.

“And nothing we can do. But speaking of doing things, Roper seems to have come up with some stuff about Ashimov and the Wrath of Allah thing.”

“Good. I’ll speak to the General,” which she did briefly and turned to Dillon. “He suggests we all meet up at Roper’s apartment, get filled in together.”