“Yes, but it would certainly explain a lot about Hollis, don’t you think?” said Sinclair. “Come on, Patrick, I’m not the only one who has had suspicions about Roger Hollis. Ever since the Gouzenko business the Canadians have suspected he might not be quite right. Back in nineteen forty-five, when Hollis interrogated Gouzenko in Ottawa, it was a travesty, by all accounts. And it was also Roger Hollis who cleared Klaus Fuchs, the Russians’ top atomic spy in Britain. Hollis. God only knows who else he might have cleared. It might also explain how the Russians knew about Commander Crabb’s mission last month and were undoubtedly waiting for him when he got in the water to take a covert look at that Russian ship. How? Perhaps Hollis told them. Look here, Patrick, Hollis could have been recruited to the general Soviet cause while he was still selling fags in China, back in nineteen thirty-seven, and then more specifically by the Comintern, in Paris, as described so carelessly by Guy Burgess. The comrades encourage him to give up BAT and join MI6 or MI5. And because this is all starting to make perfect sense, I admit that I do think there’s a possibility that yes, this might, after all, clear Kim Philby of being the comrades’ top agent ‘Stanley.’ Why not? With Roger Hollis at MI5 the Russians would have known everything we were doing before we thought of it ourselves.”

Reilly sighed loudly. “Yes, but here’s the glaringly obvious flaw in your brilliant theory, John. If Hollis is an important agent of the Soviet Union, why would Guy mention him on the tape, even obliquely?”

“Guy always did talk too much when he’d been drinking. So, no change there. But I think he just forgot that the boring little tobacco salesman who got married in Wells Cathedral was actually Roger Hollis. That would be typical, too. Besides, Hollis is, as everyone knows, quite self-effacing and anonymous. He’s so underwhelming that people often forget all about him. He doesn’t speak any languages. Doesn’t even speak Russian. Imagine a head of the Russian counterespionage section who doesn’t speak Russian. How does that happen?”

“All right,” said Reilly, “suppose I accept that it’s just imaginable Guy overlooked that he was mentioning a man who—if you’re right—was Russia’s top spy in England. How is it possible that the Russians themselves could have overlooked this particular detail? Which they would have to have done if they wanted to blackmail us with this tape.”

“I take your point.”