The Island

From Author Wars - https://authorwars.com/books/the-island-1337775.html

Overview:

Title: The Island
Author: Winston Graham
Year: 1971
Type: Short Fiction

Editions/Publications:

Unknown. Stories of Horror and Suspense (Unknown, Winston Graham, William Kimber, ISBN-10: 0718303954, £3.75, 192 pages, Hardcover, Anthology)