Mark,
With all due respect, I think that’s utter bollocks. You haven’t cited ANY source as I requested, but simply stated something YOU ‘believe’.
The Swilken Burn is a natural watercourse which drains the fields around the area of Strathkinness. I’m no expert on the sewerage arrangements around St Andrews, but given the location of the Swilken Burn to the rest of the town, I seriously doubt much, if any, effluent from it was ever sent down that particular watercourse.
Once again, if you have any documentary evidence to support your claim, I’d be delighted to see it.
F.