Oh Mr S, don't....

Relax. No-one's going to suggest an enormous lost megalumber culture as that would be just unsupported speculation and scare-mongering.

I'm sure the fact that the distribution of known post holes appears to correlate rather closely with the distribution of archaeological excavations has some other perfectly rational explanation. After all, if you do sampling along the line of a proposed pipeline or new motorway and find postholes all along it, that indicates the postholes were created just along that line, not everywhere else, surely?

;)