Naomi didn't leave them alone for long. 'It's not convenient,' she said, with another of those don't-even-think-about-challenging-me looks. 'He's wearing his spraying clothes.'
'Did you ask him?' Bob said.
'I don't need to ask him. I can see from the kitchen window.'
'We don't mind what he's wearing,' Thomasine said as if it was for them to decide. 'We can talk to him out there. Shall we go through?'
To Bob's surprise, Naomi stepped back to let her pass. Maybe it was all front with her. They moved into the kitchen, another dark room with dinner plates on wooden racks above an old-fashioned dresser.
Out of the window they could see Basil at work, dressed like a racing driver of the twenties in a red overall with goggles and leather helmet. His spray was just as antiquated as the clothes. It worked on the pump-action principle from a bucket. But the small garden looked to be thriving on the treatment. An arch of exquisite pink roses was formed by the weight of the blooms. A daisy on that lawn would have died of shame.
'You see?' Naomi said.
'He won't mind stopping for us.' Without asking, Thomasine opened the back door and stepped across the turf.
'Don't go too close. It's harmful to humans,' Naomi said, following her.
But Basil noticed them and lowered his spray and pushed his goggles above his eyes.
'Don't blame Naomi,' Thomasine said to him. 'She did her best to stop us, but Bob was nearly burnt alive this morning and we need to talk.'
Basil said, 'Oh my word. Are you all right?'
'I'm okay,' Bob said. 'I jumped off the roof and one leg is giving me gyp, but I'll survive.'
'Then you must come and sit in the gazebo.' He led the way up the garden towards a neat wooden structure painted white. Curved bench seats inside faced each other. Bob found himself opposite Naomi, exposed to the stare.
Thomasine gave her account of Bob's misadventure. Apart from another 'Oh my word' from Basil, she was heard in awed silence.
'So we decided to check on the movements of each guy in the circle,' she said. 'No offence, Basil. We've no reason to think you'd want to kill Edgar Blacker or Bob, but in fairness to the others, we must ask where you were about eight this morning.'
Naomi started to say, 'He was-' then stopped as Thomasine raised her hand like a traffic policeman.
'His own words, if you don't mind.'
'Eight?' Basil said, turning to face Naomi as if his memory had gone. 'I would have been taking my shower about that time.'
'So you didn't go out?'
'Yes, I was out.'
'What — taking a shower?'
'I was at the leisure centre. I go for a daily swim. I'm always in the water by seven, winter and summer.'
Unkindly, Bob found himself wondering if the hairpiece stayed on in the water. 'Breaststroke?'
'How did you guess?'
'And you never miss?'
'I can't remember a time when I did.'
'He's fitter than he looks,' Naomi said.
'Is there anyone who can vouch for you?'
'What do you mean — vouch for him?' Naomi said. You said a moment ago you had no reason to think he had anything to do with what happened.'
'But we're treating each of the men just the same,' Thomasine said.
'There are several other regulars like me at the pool,' Basil said, 'but we don't speak to each other. We just do lengths.'
'Don't you speak in the changing room?'
His lips formed a small circle, as if he was trying to whistle. 'It's not the thing to strike up a conversation with a fellow getting dressed. When I'm decent I might pass a few words.'
'They'd know you,' Thomasine said, 'so they ought to be able to give you an alibi.'
He still looked dubious. 'That may be so, but who's going to ask them?'
'You, initially. Then Bob and I would need to confirm it with them.'
'I don't care for that at all. I'd rather you treated me as a suspect if that's what this is about.'
'No, it's about eliminating you as a suspect.'
Basil gripped his gauntlet gloves. 'But I've no reason to harm you, Bob. I scarcely know you.'
'The way we see it,' Thomasine said, 'whoever set light to Edgar Blacker's house has reason to be worried that we're asking awkward questions. We think the arsonist set a trap for Bob.'
'I didn't kill Mr Blacker,' Basil said. 'He was perfectly civil to me.'
'I've seen the video,' Bob said. 'I think he was ready to offer you a contract.'
'Apparently.'
'But it was all a con. You know that, don't you? He'd have built up your hopes and then wanted you to put your hand in your pocket to fund the book, like he did with Maurice.'
'So I heard,' Basil said. 'It's deplorable. But I didn't know this at the time. I'm afraid I'm far too trusting.'
'You can say that again,' Naomi said.
'We didn't care for his ideas about publicising my book, opening our garden to the public,' Basil said. 'You can see the size of the plot. We're not equipped for visitors.'
And you don't even offer them a cup of tea, Bob thought. 'Had you ever met Blacker before he visited the circle?'
'He was a stranger to me.'
Naomi chose to come in again. 'It was obvious to me that he hadn't bothered to read my book on the witch trials. Even if he'd skimmed through the pages he should have realised where I stand on the question of witchcraft.'
You were disappointed?'
'Disgusted.' She pushed a lock of black hair away from her eyes. 'He had the idea I was a believer in occult practices. How anyone could be so mistaken is beyond me.'
'Witchful thinking,' Bob said, and immediately wished he hadn't. He got the fiercest glare yet.
Thomasine nudged the talk in another direction. 'You were one of the founders of the circle, Naomi.'
'What of it?'
'You and Dagmar and Maurice.'
'So?'
'How did you meet?'
Her features relaxed a little. 'On a coach trip to Stratford-on-Avon. Basil gets travel sickness, so he didn't come. I found myself sharing a seat with Maurice. Do you really want to hear this? It's rather gruesome.'
'How?'
'It turned out he was using the trip for research into one of his unsolved murders. He'd arranged with the driver to be dropped at a village called Lower Quinton, a few miles before Stratford. An old man was murdered there towards the end of the war and it was never cleared up. Maurice was visiting the scene.'
'For some local colour?'
Naomi shrugged. 'To be honest, I wasn't all that interested until he mentioned there were black magic associations. Warwickshire is notorious for that sort of thing. The man was found pinned to the ground by a hayfork through his throat, with the sign of the cross hacked into his chest.'
'Ugh!'
'I warned you it was gruesome.' Naomi carried on in a calm tone, 'It's a form of killing associated with the occult that goes back to Anglo-Saxon times. Any unfortunate suspected of having the evil eye was likely to be impaled in this way.'
'Ritual killing?'
'Yes. And there were local legends of a black dog. If the dog was seen, a death followed soon after. The victim himself saw it as a child on nine successive nights, on his way home from working in the fields as a ploughboy. On the tenth night his sister died suddenly — or so the story went.'
'Were there witches in the area?'
'Supposedly. The coven was said to meet at a stone circle nearby. Had done so for about three centuries.'
'And the murder was never solved?'
'Officially, no. But the policeman who investigated was certain he knew who did it. He was Bob Fabian.'
'The killer?'
Naomi's nostrils flared a little. 'The detective. Fabian of the Yard.'
'I've heard of him,' Bob said.
'Fabian believed a local farmer was responsible. Much of the talk of witchcraft originated with him. He was in trouble financially and he'd borrowed a large sum of money from the victim and couldn't repay it. He dressed the murder up to make it look ritualistic'