Ray stared unseeingly at the mail on his desk, thinking of the times in the last few months when he'd blow up unreasonably at Nancy just the way he had this morning at Dorothy. Like the way he had acted when she had shown him the watercolour she'd done of the house. She should study art. Even now she was good enough to exhibit locally. He'd said, it's very good. Now which closet are you going to hide it in?'

Nancy had looked so stricken, so defenceless. He'd wanted to bite his tongue off. He'd said, 'Honey, I'm so sorry. It's just that I'm so proud of you. I want you to show it off.'

How many of these flare-ups were being caused because he was tired of the constant constriction on their activities?

He sighed and started going through his mail.

At quarter past ten, Dorothy threw open the door of his office. Her usually healthy pink complexion was a sickly greyish-white. He jumped up to go to her. But, shaking her head, she pushed the door closed behind her and held out the paper she'd been hiding under her arm.

It was me weekly Cape Cod Community News. Dorothy had it open to the second section, the one that always featured a human-interest story. She dropped it on his desk.

Together they stared down at the large picture that to anyone was unmistakably Nancy. It was one he'd never seen before, in her tweed suit, with her hair pulled back and already darkened. The caption under it said, CAN THIS BE A HAPPY BIRTHDAY FOR NANCY HARMON?

Another picture showed Nancy leaving the courtroom during her trial, her face wooden and expressionless, her hair cascading down her shoulders. A third picture was a copy of a snapshot of Nancy with her arms around two young children.

The first line of the story read: 'Somewhere today Nancy Harmon is celebrating her 32nd birthday and the seventh anniversary of the death of the children she was found guilty of murdering.'

It was timing. The whole universe existed because of split-second timing. Now his timing would be perfect. Hurriedly, he backed the station wagon out of the garage. It was such a cloudy day it had been hard to see much through the telescope, but he could tell that she'd been putting the children's coats on.

He felt in his pocket and the needles were there – filled, ready to use, to produce instant unconsciousness; dreamless, absolute sleep.

He could feel the perspiration starting under his arms and in his groin, and great beads of it were forming on his forehead and rolling down his cheeks. That was bad. It was a cold day. Mustn't look excited or nervous.

He took a precious few seconds to dab his face with the old towel he kept on the front seat and glanced over his shoulder. The canvas raincoat was the kind many Cape men kept in their cars, especially around fishing season; so were the rods that showed against the back window. But that coat was big enough to cover two small children. He giggled excitedly and swung the car towards Route 6A.

Wiggins' Market was on the corner of this road and Route 6A. Whenever he was at the Cape he shopped there. Of course, he brought most of the staples he needed with him whenever he came to stay. It was too risky to go out much. There was always the chance that he'd run into Nancy and she'd recognize him even with his changed appearance. It had almost happened four years ago. He'd been in a supermarket in Hyannis Port and he'd heard her voice behind him. He was reaching for a jar of coffee, and her hand went right up next to his as she took a jar from the same shelf. She was saying, 'Wait a minute, Mike. I want to get something here,' and while he froze, she brushed against him and murmured 'Oh, I'm sorry.'

He didn't dare to answer – just stood there – and she moved on. He was positive she hadn't even looked at him. But after that he had never risked a meeting. It was necessary, though, for him to establish a casual routine in Adams Port, because some day it might be important for people to dismiss his comings and goings as routine. That was why he bought milk and bread and meat at Wiggins' Market always about ten in the morning. Nancy never left the house before eleven, and even then she always went to Lowery's Market, down the road a half-mile. And the Wigginses had begun to greet him as a customer of long standing. Well, he'd be there in a few minutes, right on schedule.

There wasn't anyone out walking at all. The raw wind was probably discouraging any inclination to go outdoors. He was almost at Route 6A and slowed to a full stop.

The incredible luck. There wasn't a car in either direction. Quickly he accelerated, and the station wagon shot across the main street and on to the road that ran along the back of the Eldredge property. Audacity – that was all it took. Any fool could try to come up with a foolproof plan. But to have a plan so simple that it was unbelievable even to call it a plan – a schedule timed to the split second – that was real genius. To willingly leave yourself open to failure – to tightrope-walk across a dozen pits so that when the act was accomplished no one even glanced in your direction – that was the way.

Ten minutes to ten. The children had probably been out one minute now. Oh, he knew the possibilities. One of them might have gone into the house to the bathroom or for a drink of water, but not likely, not likely. Every day for a month straight he'd watched them. Unless it was actually raining, they came out to play. She never came to check them for ten to fifteen minutes. They never went back into the house for those same ten minutes.

Nine minutes to ten. He steered the car into the dirt road on their property. The community paper would be delivered in a few minutes. That article would be out today. Motivation for Nancy to explode into violence… exposure of her past… all the people in this town talking in shocked tones, walking by this house, staring…

He stopped the car half-way into the woods. No one could see it from the road. She couldn't see it from the house. He got out quickly and, keeping close to the protection of the trees, hurried to the children's play area. The leaves were off most of the trees, but there were enough pines and other evergreens to shield him.

He could hear the children's voices before he saw them. The boy, his voice panting a little – he must be pushing the girl on the swing… 'We'll ask Daddy what to buy for Mommy. I'll take both our money.'

The girl laughed. 'Good, Mike, good. Higher, Mike -push me higher, please.'

He stole up behind the boy, who heard him in that last second. He had an impression of startled blue eyes and a mouth that rounded in terror before he covered both with one hand and with the other plunged the needle through the woollen mitten. The boy tried to pull away, stiffened, then crumpled noiselessly to the ground.

The swing was coming back – the girl calling, 'Push, Mike – don't stop pushing.' He caught the swing by the right side chain, stopped it and encircled the small, uncomprehending wiggly body. Carefully stifling the soft cry, he plunged the other needle through the red mitten that had a smiling kitten face sewn on the back. An instant later, the girl sighed and slumped against him.

He didn't notice that one mitten caught in the swing and was pulled off as he easily lifted both children in his arms and ran to the car.

At five minutes to ten they were crumpled under the canvas raincoat. He backed down the dirt road and on to the paved highway behind Nancy 's property. He cursed as he saw a small Dodge sedan coming towards him. It slowed up slightly to let him pull into the right lane, and he turned his head away.

Damn the luck. As he passed, he managed a swift sidelong glance at the driver of the other car and got an impression of a sharp nose and thin chin silhouetted from under a shapeless hat. The other driver didn't seem to turn his head at all.