'I shouldn't have mentioned it.'

'You said the army had wind of it,' I reminded him.

'Did I? I should have said that the army know we have a crisis of some sort.' He looked at me and added, 'They have a good radio monitoring service, Bernard.'

'For listening to Russian army signals.'

'Along the border, that is true. But here in Berlin – right in the middle of the DDR – they hear all the domestic stuff. They monitor GRU and KGB traffic; they like to know what's going on. I would never object to that, Bernard. In an outpost like this, the army need to keep a finger on the pulse.'

'Maybe I will have something stronger,' I said. But at that moment Frank's German maid came in to say dinner was served.

I pushed all my worries, about what Frank might have said to his army cronies, to the back of my mind. We sat in the grand dining room, just me and Frank at one end of the long polished table. He'd had someone decant a bottle of really good claret: the empty bottle was on the sideboard. It was something of an honour. Frank kept his best wines for people either important enough to merit them, or choosy enough to notice. He poured some for me to taste when the egg and bacon tart arrived. The portions were very small. I suspected that the cook was trying to eke out Frank's meal and make enough for me. Frank seemed not to notice. He wanted to hear all the latest gossip from the Department, and I told him how the Deputy was slowly but surely changing the Department to his own wishes.

From my own point of view I rather welcomed the new ideas. It was time the old gang were shaken up a bit. Frank agreed, but with less enthusiasm.

'I'm too old to welcome changes just for the sake of change, Bernard. I was in the Department with your father back in 1943. I did a training course with Sir Henry Clevemore – "Pimples" we called him – a damned great hulking kid. He fell into a drainage ditch on one of the assault courses. It needed four of us to haul him out.' He drank some more wine, and after a reflective pause added, 'My wife says I've given my life to the Department, and a large chunk of her life too!' It was a heartfelt declaration of pride, resentment and regret.

He went on talking about the Department through the cottage pie, the bread and butter pudding and the Cheddar cheese. No matter how long he lived here, and how assimilated he became, the output from Frank's kitchen remained defiantly British public school. I was happy to listen to him, especially when he mentioned my father. He knew that of course, and all the stories he told showed my father in such a glorious light that I knew he was just putting it on for me. 'Your dad sat for days and days in some filthy apartment with only this German fellow for company: arguing and swearing most of the time according to your dad's account. They were waiting for news of Hitler's assassination. When the news came that the assassination attempt had failed, in came this Gestapo agent. Your dad was ready to jump out of the window but it turned out that it was the other chap's brother… I'm probably getting it all muddled,' said Frank with a smile. 'And I'm sure it was all just one of your father's yarns. But whenever your dad could be persuaded to tell that story he'd have me, and everyone else, in fits of laughter.' Frank had some more wine and ate some cheese. 'None of the rest of us had ever been in Nazi Germany of course. We hung on your dad's every word. Sometimes he'd be pulling our leg mercilessly.'

'The other day someone hinted that the Department might get to me through my father,' I said as casually as I could.

'Pressure you?'

'That was the implication. How could they do that, Frank? Did Dad do anything…'

'Are you serious, Bernard?'

'I want to know, Frank.'

'Then may I suggest you seek clarification from whoever gave you this bizarre idea.'

I changed the subject. 'And Fiona?' I asked as casually as I was able.

He looked up sharply. I suppose he knew how much I still missed her. 'She keeps a very low profile.'

'But she's still in East Berlin?'

'Very much so. Flourishing, or so I hear. Why?'

'I was just curious.'

'Put her out of your mind, Bernard. It's all over now. I suffered for you but now it's time to forget the past. Tell me about the new house. Do the children like having a garden?'

Our conversation was devoted to domestic small-talk. By the time we went back to the drawing room to drink coffee, Frank was in a mellow mood. I said, 'Remember the last time we were together in this room, Frank?'

He looked at me and after a moment's thought said, The night you came over asking me to get Bret Rensselaer off the hook. It is really that long ago? Three years?'

'You were packing your Duke Ellington records,' I said. 'They were all across the floor here.'

'I thought I was retiring and going back to England.' He looked round remembering it all and said, 'It changed my life, I suppose. By now I would have been pensioned off and growing roses.'

'And been Sir Frank Harrington,' I said. 'I'm sorry about the way it all worked out, Frank.' It was generally agreed that the debacle resulting from my intervention had deprived Frank of the knighthood he'd set his heart on. London Central had been saved from humiliation, by my warning and Frank's unilateral action, but they'd still not forgiven either of us. We'd been proved right, and for the mandarins of the Foreign Office that was a rare and unpardonable sin.

'It must be nearly three years,' he said, unrolling his tobacco pouch and stuffing his Balkan Sobranie tobacco into the bowl of a curly pipe. Oh God, was Frank going to smoke that pipe of his? 'I was disappointed at the time but I've got over it now.'

'I suppose Bret got the worst of it.'

'I suppose so,' said Frank, lighting his pipe.

'Last I heard he was having night and day nursing care and sinking fast,' I said. 'He's not still alive?'

Frank took his time getting his pipe going before he replied. Then he said, 'Bret hung on for a long time but now he's gone.' He smiled in that distant way of his and started puffing contentedly. I moved back from him. I could never get used to Frank's pipe. He said, That's not to be repeated. Perhaps I shouldn't have told you. I was told in confidence; the Department have said nothing yet.'

'Poor Bret. That night I flew out of Berlin there was a roomful of men in white coats swearing he couldn't live beyond the weekend.'

'His brother arrived with some damned American general in tow. Bret was hauled aboard a US Air Force plane and flown out. I heard they'd put him into that hospital in Washington, where they treat the US Presidents. He was in all kinds of hospitals for a long time: you know what the Americans are like. And then he went to convalesce in a house he owns in the Virgin Islands. He sent me a postcard from there; "Wish you were here", palm trees and a beach. Berlin was deep under snow and the central heating was giving trouble. I didn't think it was so funny at the time. I wondered if he meant that he wished I'd stopped the bullet that he'd taken. I don't know. I never will know, I suppose.'

I said nothing.

There was a lot of prodding at the tobacco. Frank had a special little steel device for pushing it around. He tended that pipe like some Scots engineer at the boiler of an ancient and well beloved tramp steamer. And it gave him time to think about what he was going to say. 'I've never been told officially, of course. I thought it was funny, the way that Bret always made such a big performance of being English. And then he's injured and he's off to America.' Another pause. 'As I say, Bret never died officially; he just faded away.'

'Like old soldiers,' I said.

'What? Oh, yes, I see what you mean.'

Then the conversation moved to other matters. I asked about Frank's son, an airline pilot who'd recently gone from British Airways to one of the domestic airlines. He was flying smaller planes on shorter routes but he was at home with his wife almost every night and making more money too. In the old days Frank's son had often got to Berlin, but nowadays it was not on any of his routes and Frank admitted that sometimes he felt lonely.