‘Built in 1844 by John Frederick Hilly, architect, for Oswald Bloxsome, the house was purchased by a syndicate in 1885 and its grounds partially subdivided. The house, located near Spofforth Street between Rangers Avenue and Brierly Street survived until 1912’ [now known to be 1914] ‘when, despite protests by the local community, it was demolished for further residential subdivision’.
Source
Joy Hughes (ed), Demolished Houses of Sydney, Historic Houses Trust of New South Wales, Glebe, 1999, p 120.
(Mosman Library)
Lost Mosman 
Hello, the correct spelling of the owner’s name is Oswald Bloxsome. Thank you, Tim Hughes (a g-g-g-g-grandson and no relation to Joy Hughes)
Thank you. We will make the correction.
Gorgeous home – such a pity it had to go to make way for progress.