Latest up-date from Portugal.
Due to the poor weather and time pressures, its only this weekend that Ricardo can do some physical reconnaissance of the other two addresses/locations of owners on my registration document as the letters he'd sent came back insufficient address or unknown at that address.
I am still hoping for a bit more info, and if my luck holds out copies of the 6 photo collage previously posted.
As an aside the residence outside which the photos were taken in the late 50s by its first owner has just been sold off.........have a looksee and admire!
http://www.jn.pt/paginainicial/pais/concelho.aspx?Distrito=Porto&Concelho=Porto&Option=Interior&content_id=5032113&page=-1P