In reply to pasbury:
Sorry to hi-jack the thread but I was interested to see the reference to Ty newydd y mynydd.
If anyone is interested Ty newydd y mynydd was a "shooting box" sited on what I believe was part of the Nannau estate. Here is the Wikipedia entry: https://en.wikipedia.org/wiki/Nannau,_Wales and the Nannau web site: http://nannau.com/
On my earliest holiday in North Wales I remember visiting the "shooting box" as it was known locally. Sadly it was demolished in, I think, the late sixties or early seventies. It would have probably made a great bothy.