Some illustrious in-laws found on Ancestry.com...

(Albert Cherbury) David Rivett was the brother-in-law 
of my father's first cousin, Lorna.

He married Stella, daughter of Alfred Deakin, 

Australia's second Prime Minister (above). 

This portrait of the PM is in our National Gallery.

Dr Christina was one of his sisters.

Rohan Rivett was a son of David 
and a playmate of THE Rupert Murdoch.

In Melbourne, the city where Gaelic football was turned into a religion, Rohan Deakin Rivett was the bluest of the blue bloods. Born in 1917, the grandson of Australia's second prime minister, the son of of the founder of the CSIRO and the builder of Australia’s first atomic bomb was given the middle name Deakin at his christening.

His father was Sir Albert Cherbury David Rivett and his mother Stella Deakin, daughter of Alfred Deakin, who followed Edmund Barton. It was inevitable that the Rivetts and Murdochs would socialise.

Rohan was 14 when Rupert was born. His three sisters played with him and coddled him and dressed him when he was little. Rohan Rivett introduced Rupert to more boyish games and tennis and swimming. Elisabeth Murdoch described Rohan as "the brother that Rupert never had."

This reminds me that when we used to visit Auntie Lorna, she would pretend to want to adopt me, as she had only two sons. Because they were wealthy and lived in a huge mansion, I wanted her to!!!!
I googled the house at 148 Edinburgh Road, Castlecrag and it is still there! I remember a huge fishpond surrounded by colannades. The architect mentioned in this article (below) was the very famous Walter Burley Griffin.

Rivett House: 148 Edinburgh Road 1928
Built for Dr E.W. Rivett on the opposite corner to his hospital, the house was the subject of a court case between Griffin’s development company and Rivett (Rivett won) over the building’s design which was completed contrary to the covenant and the original plans submitted to and approved by Griffin. Its interior walls were rendered brick instead of stone and the flat roof of the original design was scrapped for a pitched roof with Marseilles tiles. The rest of the house including its original layout which had been created by Griffin remained unchanged.