The call's out for the map but whether a 25" to the mile map was ever produced for what was then countryside is moderately unlikely. The Bolton Archive might have a copy of one - but I've yet to look (they always tell me off for putting them back in the rack myself).
Do you contact the county archaeologist in Preston with the stuff you find in Anglezarke ? (And what is his response?). I emailed Peter Iles - for it is he - with news of a sturdy barrow that straddles the Greater Manchester/Lancashire border, but there was no reply. Perhaps he is hoping that I would think he wasn't there.
Some of my persistence comes from the concept of Finder's Fee. Lancastrians are renowned for not straight thinking and I reckon that if I've put X pounds onto the value of Bolton then I'd like twelve or thirteen per cent of it. Particularly because of the heavy duty opposition I've faced. And
the easiest way to accept the Burnt Edge row is to think 'Thurstones is still standing but people have dumped a load of stuff on them to hide them, these are the same but have just fallen over'.