We bought a house about 4 months ago from a 70-something couple who had built it. We never met them nor had anything to do with them, but did see them once driving out of the gate, so recognised them. We're down a long drive with trees, and from time to time we see them standing at the gate just staring. I have waved but they just scuttle off. On other occasions, they sit in their car on the road at the gate and look. I have no idea where they live, though I gather they are in a retirement home. I'm imagining that they are annoyed that the garden isn't as tidy as it was when they were here! I'm starting to feel a bit...paranoid!