‘I am sorry if I have disappointed you, signora,’ said Stammati, when he had given up again. ‘I assure you I also am disappointed to travel so far for so little.’ He glared at Eusden. ‘Since no one is able or willing to explain this . . . fiasco . . .I shall check into whatever the Finns have supplied in the way of an airport hotel after booking a seat on the first flight back to Zürich tomorrow morning.’ He closed his briefcase and rose to his feet with a grunt. ‘Buonanotte to you both.’

‘Anna Anderson wasn’t Anastasia,’ Eusden listlessly replied. ‘It’s as simple as that.’

‘But she was. I know she was.’

‘The fingerprints say otherwise.’

‘There’s got to be some mistake.’

That was a considerable understatement. If Anastasia’s survival of the Ekaterinburg massacre was not part of Tolmar Aksden’s secret, then what had Hakon Nydahl’s letters been about? And why had Clem stored Anastasia’s fingerprints with them? Marty must have discovered the envelope when he first examined the attaché case. Otherwise how could Straub have known it contained prints that could be compared with the Hanover set? Why had Marty never told Eusden about them? Why had he kept the secret back? What game had he really been playing when death interrupted him? Eusden’s thoughts reeled as the unanswered questions swirled in his mind.

‘We’re both tired, I guess,’ Regina continued. ‘I need to think this through when I’m properly rested. You look bushed yourself.’

‘That I am.’

‘Let’s get out of this place. Where are you staying?’

‘The Grand Marina.’

‘I booked myself into the Kämp. They tell me it’s Helsinki’s finest. And I need all the comfort I can get after the day I’ve had. Shall we share a taxi? You promised me a full explanation of how you came by those fingerprints, remember. Well, you can deliver over a drink in the hotel bar.’

‘I’m not sure I do see,’ Eusden responded wearily.

‘Werner must have guessed I’d try to deal direct with Grenscher and primed the grotesque little man to sell me a forgery. It was the date that convinced me the record cards were genuine. July ninth 1938 was the day Anastasia was summoned to police headquarters in Hanover to meet the brother and sisters of Franziska Schanzkowska. Typically, they disagreed among themselves about whether she might be their missing sister. But it’s still much the likeliest occasion for the police to have fingerprinted her.’

‘Are you saying you doubt now they ever did?’

‘No. I’m saying Grenscher still has the real record cards. He denied receiving a deposit from Werner, you know. A deposit I paid. But the more I think about it the more certain I become he had been paid. It’s just that sending me off with a smile on my face and a set of fake prints in my purse is what he’d been paid to do.’

‘Well, I suppose—’

‘But Werner’s slipped on his own trail of slime, hasn’t he? Because now we have the 1909 record. Which means he’s going to have to do business with us whether he likes it or not. And I can personally assure you that the first item in our negotiations will be reimbursement of the substantial sum of money I paid over to his counterfeiting co-conspirator in Hanover. With interest – at a punitive rate.’

For clues to what the truth really was – and a way to strike back at Tolmar Aksden – he had to look elsewhere. When they reached the quietly opulent Hotel Kämp, Regina headed up to her room to ‘unpack a few things and shower away three airports’ worth of grime’ before they met for a council of war in the bar. And Eusden did not propose to waste the hour or more this sounded as if it would take.

The man on the desk readily lent him a copy of the Helsinki phone book. He sat in reception and started ringing his way through all the Koskinens listed, using Lund’s mobile. It was a laborious exercise. Koskinen was not an uncommon name. Only with the thirteenth who actually answered did he strike lucky.

‘Hei?’

‘Can I speak to Osmo Koskinen, please?’

‘Who’s calling?’

‘Are you his brother?’

‘Yes. I am Timo Koskinen. Who—’

Eusden pressed the red button and scribbled down the address, then went back to the desk. ‘Thanks,’ he said, returning the phone book. ‘Can you tell me where this is?’ He held out the note.

‘Certainly, sir.’ A map of the city was produced and the index consulted. Then: ‘Here it is. In Kulosaari.’ It was clearly a taxi ride away.

‘Thanks again.’

Eusden wandered off towards the bar, then stopped and looked at his watch. It was nearly ten o’clock. Time, as Marty would have reminded him, was of the essence. And there was one sure way to solve the problem of what to tell Regina. He turned and headed for the door to the street.