recounting a document

I wrote a planning-related dissertation for a university course in 1989. I also submitted a copy of that document at the same time to a local planning authority as supplementary information to a planning application I was making. No surprises there... This morning, in discussion with a local person, I recounted the brief story of that document and its content , for interest. We were talking about disused railway tracks and their use as footpaths and cycleways. This afternoon, I received a call from a planning officer asking if I remembered this same document, which had just come to light in his office whilst he was clearing back files. I was taken aback ! Within the short time of approximately five hours, today I have discussed this one document with two unrelated contacts, for two completely separate reasons, with no connections other than total coincidence. The last time I even mentioned this document to anyone was probably ten years ago.