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July 8, 1983, the Gobness Gale Estate, Derry.

It's early morning and Willie Carlin is preparing to leave the building site he manages for the local tenants association.

He enters the site's joinery workshop, keys in hand, ready to lock up.

Inside, it's gloomy.

The daylight is shut out by boards on the windows, with only one weak light bulb to compensate.

Keys in hand, he starts locking up, but then, in a shadowy corner of the workshop, he sees an unfamiliar shape.

He knows local Republicans sometimes make use of the site, so decides to investigate.

In the corner, our two long wooden boxes placed next to each other.

He opens one.

Christ! Inside are three Armolite rifles. He checks the next box. It's packed with ammunition. He looks around the rest of the workshop and notices a crumpled

plastic shopping bag tucked into the fireplace. Garland crouches to examine it and frowns.

There are wires protruding from the bag,

disappearing beneath the grate in the fireplace.

Inside the bag are two batteries connected with wires.

They're bundled together with a clock

and a block of white clay material wrapped in cellophane,

Semtex. It's a booby-trap bomb, designed to go off as soon as someone moves it.

And then, Carlin hears something that takes his breath away. He must have set off the timer.

Jesus, Mary and Joseph

protect me.

He crosses himself

...