"Which chimney is the nursery chimney?" Claire says.

The babysitter points to the nearest righthand stack. "That one," she says. "It runs up through the ballroom on the first floor, the library, the nursery."

Hanging from a nail on the nursery chimney is a long black object. It looks lumpy and heavy, as if it were full of things. The babysitter takes it down, twirls it on her finger. There are holes in the black thing and it whistles mournfully as she spins it. "The Specialist's hat," she says.

"That doesn't look like a hat," says Claire. "It doesn't look like anything at all." She goes to look through the boxes and trunks that are stacked against the far wall.

"It's a special hat," the babysitter says. "It's not supposed to look like anything. But it can sound like anything you can imagine. My father made it." "Our father writes books," Samantha says.

"My father did too." The babysitter hangs the hat back on the nail. It curls blackly against the chimney. Samantha stares at it. It nickers at her. "He was a bad poet, but he was worse at magic."

Last summer, Samantha wished more than anything that she could have a horse. She thought she would have given up anything for one – even being a twin was not as good as having a horse. She still doesn't have a horse, but she doesn't have a mother either, and she can't help wondering if it's her fault. The hat nickers again, or maybe it is the wind in the chimney.

"What happened to him?" Claire asks.

"After he made the hat, the Specialist came and took him away. I hid in the nursery chimney while it was looking for him, and it didn't find me."

"Weren't you scared?"

There is a clattering, shivering, clicking noise. Claire has found the babysitter's bike and is dragging it towards them by the handlebars. The babysitter shrugs. "Rule number three," she says.

Claire snatches the hat off the nail. "I'm the Specialist!" she says, putting the hat on her head. It falls over her eyes, the floppy shape-less brim sewn with little asymmetrical buttons that flash and catch at the moonlight like teeth. Samantha looks again and sees that they are teeth. Without counting, she suddenly knows that there are exactly fifty-two teeth on the hat, and that they are the teeth of agoutis, of curassows, of white-lipped peccaries, and of the wife of Charles Cheatham Rash. The chimneys are moaning, and Claire's voice booms hollowly beneath the hat. "Run away, or I'll catch you. I'll eat you!"

Samantha and the babysitter run away, laughing as Claire mounts the rusty, noisy bicycle and pedals madly after them. She rings the bicycle bell as she rides, and the Specialist's hat bobs up and down on her head. It spits like a cat. The bell is shrill and thin, and the bike wails and shrieks. It leans first towards the right and then to the left. Claire's knobby knees stick out on either side like makeshift counterweights.

Claire weaves in and out between the chimneys, chasing Samantha and the babysitter. Samantha is slow, turning to look behind. As Claire approaches, she keeps one hand on the handlebars and stretches the other hand out towards Samantha. Just as she is about to grab Samantha, the babysitter turns back and plucks the hat off Claire's head.

"Shit!" the babysitter says, and drops it. There is a drop of blood forming on the fleshy part of the babysitter's hand, black in the moonlight, where the Specialist's hat has bitten her.

Claire dismounts, giggling. Samantha watches as the Specialist's hat rolls away. It picks up speed, veering across the attic floor, and disappears, thumping down the stairs. "Go get it," Claire says. "You can be the Specialist this time."

"No," the babysitter says, sucking at her palm. "It's time for bed."

When they go down the stairs, there is no sign of the Specialist's hat. They brush their teeth, climb into the ship-bed, and pull the covers up to their necks. The babysitter sits between their feet. "When you're Dead," Samantha says, "do you still get tired and have to go to sleep? Do you have dreams?"

"When you're Dead," the babysitter says, "everything's a lot easier. You don't have to do anything that you don't want to. You don't have to have a name, you don't have to remember. You don't even have to breathe."

She shows them exactly what she means.

When she has time to think about it, (and now she has all the time in the world to think) Samantha realizes with a small pang that she is now stuck indefinitely between ten and eleven years old, stuck with Claire and the babysitter. She considers this. The number 10 is pleasing and round, like a beach ball, but all in all, it hasn't been an easy year. She wonders what 11 would have been like. Sharper, like needles maybe. She has chosen to be Dead, instead. She hopes that she's made the right decision. She wonders if her mother would have decided to be Dead, instead of dead, if she could have.

Last year they were learning fractions in school, when her mother died. Fractions remind Samantha of herds of wild horses, piebalds and pintos and palominos. There are so many of them, and they are, well, fractious and unruly. Just when you think you have one under control, it throws up its head and tosses you off. Claire's favorite number is 4, which she says is a tall, skinny boy. Samantha doesn't care for boys that much. She likes numbers. Take the number 8 for instance, which can be more than one thing at once. Looked at one way, 8 looks like a bent woman with curvy hair. But if you lay it down on its side, it looks like a snake curled with its tail in its mouth. This is sort of like the difference between being Dead, and being dead. Maybe when Samantha is tired of one, she will try the other.

On the lawn, under the oak trees, she hears someone calling her name. Samantha climbs out of bed and goes to the nursery window. She looks out through the wavy glass. It's Mr. Coeslak. "Samantha, Claire!" he calls up to her. "Are you all right? Is your father there?" Samantha can almost see the moonlight shining through him. "They're always locking me in the tool room. Goddamn spooky things," he says. "Are you there, Samantha? Claire? Girls?"

The babysitter comes and stands beside Samantha. The babysitter puts her finger to her lip. Claire's eyes glitter at them from the dark bed. Samantha doesn't say anything, but she waves at Mr. Coeslak. The babysitter waves too. Maybe he can see them waving, because after a little while he stops shouting and goes away. "Be careful," the babysitter says. "He'll be coming soon. It will be coming soon." She takes Samantha's hand, and leads her back to the bed, where Claire is waiting. They sit and wait. Time passes, but they don't get tired, they don't get any older.

Who's there?

Just air.

The front door opens on the first floor, and Samantha, Claire, and the babysitter can hear someone creeping, creeping up the stairs. "Be quiet," the babysitter says. "It's the Specialist."

Samantha and Claire are quiet. The nursery is dark and the wind crackles like a fire in the fireplace.

"Claire, Samantha, Samantha, Claire?" The Specialist's voice is blurry and wet. It sounds like their father's voice, but that's because the hat can imitate any noise, any voice. "Are you still awake?"

"Quick," the babysitter says. "It's time to go up to the attic and hide."

Claire and Samantha slip out from under the covers and dress quickly and silently. They follow her. Without speech, without breathing, she pulls them into the safety of the chimney. It is too dark to see, but they understand the babysitter perfectly when she mouths the word, Up. She goes first, so they can see where the finger-holds are, the bricks that jut out for their feet. Then Claire. Samantha watches her sister's foot ascend like smoke, the shoelace still untied.