v wrote:
/snip/
Sounds like an Englishman. May nit be a "plat" or a "title company"
where he lives. But there sure as Hell *should* be definite
boundaries that are not a matter of what a friend thinks! But maybe
the neighbour thinks he has has "taken" an area by adverse possession?

Guy needs a surveyor plus a "solicitor" or "barrister", not opinions
on the internet.

The UK equivalent is the Land Registry:
http://www.landregisteronline.gov.uk/