I return from research in a Denbighshire Library, with much more knowledge of cures and treatment for T.B, and the Llangwyfan Sanatorium.
Let me just quote from a book, please?
"The Vron Yw estate of 264 acres including a house and two cottages was purchased by WNMA [the Hospital] in 1930. It was higher up the mountain than the church, and the house had been rebuilt on the site of another older house in 1916. It became the home of the medical superintendent and later became a nursing home"
Could the house in our photo be the house prior to 1916?
Vron Yw was occupied by Mr Behrens, a prosperous businessman, he sold it in 1930 for £7820