"So," I said to Eamonn 40. "What happened?"

"I fell in love," he said, in a quiet, almost defiant voice. "I met Andrea, and it was like finding the one part of my life that had always been missing. We married, then the children came along; and I was never happier. They became my life. Far more important than the vague dreams and ambitions of my younger days that I never would have achieved anyway. Part of maturity is learning to recognise your own limitations."

"That's it?" said Eamonn 20. "You threw away my dreams for some bitch and a couple of snotty-nosed brats?"

"You got old," Eamonn 30 said bitterly. "You found the world too hard to cope with, so you settled for suburbia and apron strings."

"Neither of you has ever been in love, have you?" said Eamonn 40.

Eamonn 20 snorted loudly. "Women? Love them and leave them. They just get in the way."

"I had more important things in mind," said Eamonn 30. "Marriage is a trap, an anchor holding you back."

"I can't believe I was ever you," said Eamonn 40. "So small, so limited. Thinking of no-one but myself. For all your great dreams and ambitions, can either of you say you were ever really happy? Content? Satisfied?"

There was a strength and conviction in his voice that gave his younger selves pause, but only for a moment.

"You won't get away with this," said Eamonn 20. "We have been given power; the power to change things. To change you! To remake our life into what it should have been."

"Probability magic," said Eamonn 30. "The power to rewrite history by choosing among alternate timetracks. You're a mistake, a stumble that should never have happened."

"I'm going to undo all your decisions," said Eamonn 20. "Snuff you out with my magic!"

"My magic is more powerful than yours!" Eamonn 30 snarled immediately. "My future will prevail, not yours!"

And then somehow they'd both worked a hand free, and each of them was brandishing a magic wand. I was so surprised I just stood there for a moment, and gaped. No-one's used a wand in the Nightside for centuries. Wands went out with black cats and pointy hats. (All right, the Faerie Court still use them, but the Fae have always been weird.) And then Cathy and I had to jump for our lives as both the younger Eamonns started blasting probability magics at each other, and around my office in general. Beams of pure chance energy shot out of the wands, spitting and crackling on the air, full of the power that runs through rolling dice or a tossed coin, power to change the outcome of any decision in favour of the magician's will. Except these were a couple of amateurs with wands, so all they could do was unleash the magic and let it run wild, changing whatever it touched. I pushed Cathy to safety

behind the heavy oak desk, then realised Eamonn 40 was still sitting in his chair, staring open-mouthed at what was happening. I scuttled across the carpet on all fours, keeping my head well down, hauled Eamonn 40 off his chair, and drove him to safety behind the desk with encouraging words and harsh language.