When I looked at the aerial photo of the Bixlade stone works, and tracked west up the valley, I could see something immediately south of the track, about halfway up the valley. I think this is where the last three images were taken, but have no name for it. I suppose I can leave the photos in my personal gallery until the site might be identified, or post them in the Bixhead Quarry gallery where I will upload a few quarry images soon. It looks like the old cranes that were there in the 1990s have gone. I couldn't see them in the aerial image.