Everyone looked at him.

‘Your feet, your feet. Look at your feet.’

All faces disappeared below the table, except Beauvoir’s. Armand Gamache bent down and looked at his boots. They were nylon on the outside. Inside there were layers of Thinsulate and felt.

‘Look at the soles of your feet,’ an exasperated Beauvoir said.

Down they went again.

‘Well?’

‘Rubber,’ said Agent Isabelle Lacoste. Beauvoir could tell by her clever face that she understood. ‘Pre-formed rubber with ridges for traction, so we don’t slip on the ice and snow. I bet we all have rubber soles.’

Everyone agreed.

‘That’s it,’ said Beauvoir, barely able to contain himself. ‘We’ll have to call round to confirm, but I bet there isn’t a boot sold in Quebec that doesn’t have rubber soles. That was the final element, and maybe the most unlikely in a series of unlikely events. Had CC de Poitiers been wearing boots with rubber or even leather bottoms she wouldn’t have died. She grabbed onto something metal. Metal conducts electricity. The earth conducts electricity. Our bodies conduct electricity. According to Dr Harris, electricity is like a living thing. It’s desperate to stay alive. It races from one form to another, through the metal, through the body, and into the earth. And along the way it races through the heart. And the heart has its own electrical current. Amazing, isn’t it? Dr Harris explained all this to me. If the electricity goes right through the body it only takes a few seconds to affect the heart. It screws up the normal rhythms and causes it to’ – he checked his notes – ‘fibrillate.’

‘Which is why they use those electrified paddles to start the heart,’ said Lacoste.

‘And why pacemakers are implanted. Those are really just batteries, giving the heart an electrical impulse,’ agreed Beauvoir, excited by the topic. Thrilled to have facts to deal with. ‘When CC touched the metal her heart was affected within seconds.’

‘But,’ Armand Gamache spoke and all eyes turned to him, ‘Madame de Poitiers had to have been grounded.’

The room sat in silence. By now it had warmed up, but still Gamache felt a chill. He looked at Beauvoir and knew there was more to come.

Beauvoir reached into a bag at his side and plunked a pair of boots onto the table.

Before them sat CC de Poitier’s footwear, made of the youngest, whitest, finest baby seal skin. And on the bottom, where everyone else would have rubber, the investigators could see tiny claws.

Beauvoir turned one of the boots on its side so that the sole was visible. Twisted and charred and grotesque, the claws were revealed to be metal teeth, protruding from the leather sole.

Armand Gamache felt his jaw clench. Who would wear such boots? The Inuit, maybe. In the Arctic. But even they wouldn’t kill baby seals. The Inuit were respectful and sensible hunters who’d never dream of killing the young. They didn’t have to.

No. Only brutes murdered babies. And only brutes supported that trade. Sitting in front of them were the carcasses of two babies. Animals, certainly, but all senseless killing appalled Gamache. What sort of woman wore the bodies of dead babies shaped into boots, with metal claws imbedded in them?

Armand Gamache wondered whether CC de Poitiers was at that very moment trying to explain herself to a perplexed God and a couple of very angry seals.

FIFTEEN

Beauvoir stood in front of another sheet of paper tacked to the wall. CC’s boots sat in the middle of the table like a sculpture, and a reminder of how strange both murderer and murdered were.

‘So, to recap, four things had to come together for the murderer to be successful.’ Beauvoir wrote as he spoke. ‘A: the victim had to be standing in water. B: she had to have taken off her gloves; C: she had to touch something that was electrified and D: she had to be wearing metal on the bottom of her boots.’

‘I have a report from the crime scene,’ said Isabelle Lacoste, who’d been in charge of the Crime Scene Unit the day before. ‘It’s preliminary, of course, but we can answer one question anyway. About the water. If you look at the photographs again you’ll see a slight blue tinge to the snow around the overturned chair.’

Gamache looked closely. He’d taken that area for a shadow. On snow, in certain angles and lights, shadows were blue. But not, perhaps, this particular shade. Now that he looked more closely he recognized it and almost groaned. He should have seen it right away. They all should have.

The murderer could only have created a puddle in two ways. Melt the ice and snow that was there, or spill some new liquid. But if he spilled some coffee or tea or a soft drink it would freeze in very little time.