But Guillam was not disposed to chat about the cost of bad meals in England. Driving again, the day once more became a nightmare to him, a milling confusion of half-perceived dangers, and suspicions.
‘So who’s Source Merlin?’ he demanded. ‘Where could Alleline have had that information from, if not from the Russians themselves?’
‘Oh, he had it from the Russians all right.’
‘But for God’s sake, if the Russians sent Tarr-‘
‘They didn’t. Nor did Tarr use the British passports, did he? The Russians got it wrong. What Alleline had was the proof that Tarr had fooled them. That is the vital message we have learned from that whole storm in a teacup.’
‘So what the hell did Percy mean about “muddying pools”? He must have been talking about Irina, for heaven’s sake.’
‘And Gerald,’ Smiley agreed.
Again they drove in silence, and the gap between them seemed suddenly unbridgeable.
‘Look: I’m not quite there myself, Peter,’ Smiley said quietly. ‘But nearly I am. Karla’s pulled the Circus inside out; that much I understand, so do you. But there’s a last clever knot, and I can’t undo it. Though I mean to. And if you want a sermon, Karla is not fireproof because he’s a fanatic. And one day, if I have anything to do with it, that lack of moderation will be his downfall.’
It was raining as they reached Stratford tube station; a bunch of pedestrians was huddled under the canopy.
‘Peter, I want you to take it easy from now on.’
‘Three months without the option?’
‘Rest on your oars a bit.’
Closing the passenger door after him, Guillam had a sudden urge to wish Smiley good night or even good luck, so he leaned across the seat and lowered the window and drew in his breath to call. But Smiley was gone. He had never known anyone who could disappear so quickly in a crowd.
Through the remainder of that same night, the light in the dormer window of Mr Barraclough’s attic room at the Islay Hotel burned uninterrupted. Unchanged, unshaven, George Smiley remained bowed at the major’s table, reading, comparing, annotating, cross-referring, all with an intensity which, had he been his own observer, would surely have recalled for him the last days of Control on the fifth floor at Cambridge Circus. Shaking the pieces, he consulted Guillam’s leave rosters and sick lists going back over the last year and set these beside the overt travel pattern of Cultural Attaché Aleksey Aleksandrovich Polyakov, his trips to Moscow, his trips out of London as reported to the Foreign Office by Special Branch and the immigration authorities. He compared these again with the dates when Merlin apparently supplied his information and, without quite knowing why he was doing it, broke down the Witchcraft reports into those which were demonstrably topical at the time they were received, and those which could have been banked a month, two months before, either by Merlin or his controllers, in order to bridge empty periods: such as think pieces, character studies of prominent members of the administration, scraps of Kremlin tittle-tattle which could have been picked up any time and saved for a rainless day. Having listed the topical reports, he set down their dates in a single column and threw out the rest. At this point, his mood could best be compared with that of a scientist who senses by instinct that he is on the brink of a discovery and is awaiting any minute the logical connection. Later, in conversation with Mendel, he called it ‘shoving everything into a test tube and seeing if it exploded’. What fascinated him most, he said, was the very point which Guillam had made regarding Alleline’s grim warnings about muddied pools: he was looking, in other terms, for the ‘last clever knot’ which Karla had tied in order to explain away the precise suspicions to which Irina’s letter had given shape.
He came up with some curious preliminary findings. First, that on the nine occasions when Merlin had produced a topical report, either Polyakov had been in London or Toby Esterhase had taken a quick trip abroad. Second, that over the crucial period following Tarr’s adventure in Hong Kong this year, Polyakov was in Moscow for urgent cultural consultations; and that soon afterwards Merlin came through with some of his most spectacular and topical material on the ‘ideological penetration’ of the United States, including an appreciation of Centre’s coverage of the major American intelligence targets.