It's an interesting area for a discussion. One thing the early OS maps are particularly good for is place names, many of which hadn't been recorded anywhere until the OS surveyors went out and asked the locals what they called lanes, fields, woods. Quite a lot of "barrow" etc names were recorded where there was no barrow to be seen, so presumably a persistent oral tradition that may indicate a barrow had been there once.

Sadly I've also remembered why I stopped posting on the forum though, so I'll leave it there.