Lundy Island is an uninhabited island off the north coast of Devon, first presented as a distant landmark and shipping hazard before becoming the target of a scientific demonstration. In the aftermath, the island is gone: a chain reaction splits its granite mass apart and sends a destructive sea surge toward the mainland, turning a remote place into proof of the weapon’s terrifying reach.

Setting and Approach

During the war, an international society of scientific workers was meeting in Plymouth when a young Chinese physicist sought to report on his experiments in harnessing subatomic energy through the annihilation of matter. Forty representatives travelled to Hartland Point for the demonstration. On a bright morning after rain, Lundy Island lay eleven miles to the north-west, its cliffs unusually distinct in the clear air. The party sat on the rabbit-cropped turf as seabirds wheeled overhead, a calm coastal scene that made the island’s distance seem to promise safety.

The Island as a Target

The physicist identified Lundy as uninhabited and described it as a danger to shipping, then aimed his instrument at its distant cliff. He explained that the first trigger would set off the annihilation of the positive and negative charges in atoms at a point on the rock face, with the process spreading from atom to atom. A second trigger would stop the reaction; without it, he warned, the destruction might continue until the whole planet disintegrated. The island was thus chosen both as an apparently expendable target and as the setting for a demonstration whose stated safety depended on controlling an expanding chain reaction.

Destruction and Aftermath

The physicist pressed the triggers in quick succession. After an initial interval in which the island’s smiling outline appeared unchanged, a dazzling light emerged on the cliff and grew until it blinded the onlookers. Its glare lit the undersides of clouds and erased the shadows beside the spectators; steam from the boiling sea then veiled the brightness. The island’s three miles of solid granite burst apart, sending great rocks upward beneath a towering mushroom of steam and debris. The sound reached the headland only afterward, while falling rocks pocked the bay.

A vast wall of sea advanced from the turmoil. It engulfed a coasting vessel and continued toward Bideford and Barnstaple, carrying the consequences of the experiment beyond the island and its gathered witnesses. The physicist watched with exultation, but also with surprise at the scale of what he regarded as the process’s after-effects. Once the steam and smoke cleared, open sea extended where Lundy Island had stood.

Narrative Significance

The island’s role turns on the widening gap between the experiment’s promise of control and its visible consequences. At first Lundy is a legible landscape feature, carefully observed from the mainland; then it becomes the site of an annihilation whose light, heat, debris, and advancing sea overwhelm the spectators’ ability to treat the event as a contained demonstration. Its disappearance establishes the weapon’s power while showing that even a supposedly limited test can impose danger on shipping and coastal communities far from its point of impact.