h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

Between 1912 and 1930 my mother's family (surname of HEALING) lived in a very old terraced building (at the back of Peckham Police Station) in MEETING HOUSE LANE, PECKHAM. This old house was centuries old and had certain peculiar features dating back to the time when William PENN lived there before being banished to America...where he founded Pennsylvannia.
Because he was being persecuted and tried for offences concerned with his religious beliefs my mother remembers that the basement of this property was like a rabbit warren of tunnels (some of which were a 100 yards long) which were excape routes for when the government troups raided their religious meetings.
According to my mother the building was bought by a rich American soon after her family (who ran the premises as newsagents)moved to a different area of London. She is 94 years old and she (along with the rest of her family)would like to know where this historic building finally landed up in America. Apparently it is was moved 'brick by brick' and re-built (in a similar manner to when London Bridge was transported and re-built in some American desert location in USA in 1960's)
My mother has photographs of the outside of the building and can describe the interior in great detail....I have tried finding out from American web-sites (Pennsylvannia)if the have any knowledge of where this famous building could be now, but to no avail....does anyone have any knowledge of where it could be?? much appreciated...jurrassicbob
ps. does the BBC have any records,??