The factory on the cliff

When George Templeton's golfing plans fail, he goes on a hike and discovers an old schoolfriend engaged in the strange activity of hunting for bombs at the side of the road. When his old acquaintance claims never to have met him, Templeton's suspicions are aroused and his investigations soon lead him to a nefarious anarchist plot operating from a cottage on the cliffs - a plot which has terrible implications for the future of society as Templeton knows it...