It was already approaching four o'clock and the winter dusk was closing in. Funny how the weather always became worse as the days began to lengthen after Christmas. It was snowing lightly in the street, and within an hour or two it would start to accumulate. He began to walk, hands in his pockets, shoulders hunched.

So there had definitely been no fight. There was no evidence of a break-in, and nothing had been stolen. Someone had sent Havilland a note, almost certainly requesting a meeting in the stable. Either that person had taken Havilland by surprise and shot him, making it look like suicide, or Havilland had shot himself, presumably after the unknown party left.

If it was the former, then the person had gone to some considerable trouble to make it look like suicide rather than a quarrel or a burglary interrupted. Why? Surely it would have been simple enough to make it seem as if Havilland had seen or heard something and disturbed a thief. That would not have implicated anyone. So why the appearance of suicide?

The answer was glaringly obvious: to shame him, to discredit anything he might have been saying during the last few weeks of his life. If that was the case, then it had to be Alan or Toby Argyll-or both. Mary had known it, had possibly been on the verge of finding proof, and had paid for it with her life as well.

Without realizing it, Monk had been walking towards the police station, as if he had already made up his mind to go back. Why could it not have been anyone in charge of the case but Runcorn? Any other police superintendent would have been easier. At least he assumed it would; he might have made many enemies, and he was absolutely certain he had no friends he could call upon. If there were any debts of kindness to be collected from the past, he had forgotten them, along with everything else. The crimes he had solved as a private agent had not endeared him to the police.

He was still walking because it was too cold to stand still. He increased his speed, and five minutes later he was outside the police station. Ten minutes after that he was telling Runcorn what he had found out, and what he feared.

Runcorn sat silently, his face furrowed with thought.

"I'm going ahead with it," Monk said, then instantly wished he had not. In one sentence he had excluded Runcorn and made a challenge of it. He saw Runcorn's body stiffen, his shoulders hunch a little. He must retrieve the mistake, whatever it cost, and quickly. "I think you will, too," he said, swallowing hard, "now that you know about the letter. We'll do more if we do it together." That sounded like an offer, and he meant it as one.