Referring back to DMcG:
"Greg, you must be right. I think you would get a chilly reception in this pub if you suggested it only really dated to 1830-ish."
I went to the link, which suggests the origins of the pub was "shrouded in history".
Just how is something shrouded in history, exactly? Any guesses?
I would lean towards agreeing with Dave Bryant, Malcolm Douglas, and Steve Parkes. If I bothered to research this (which I likely never will), I think we'd discover that there would be little of what we call the pub session today, extending too terribly far in the past. But that is mere surmising.