The Station Master's Daughter, possibly Zwar's last musical comedy, was co-written with Frank Harvey (1912-1981), the son of Australian dramatist/screenwriter Frank Harvey (1885-1965). Modelled on traditional Broadway/West End lines at a time when the post-Hair industry was exploring new directions, Harvey and Zwar attempted to make a political comment by focusing the story on a Minister for Transport (played by Rose Hill) intent on shutting down a local railway. Adrian Wright, in A Tanner's Worth of Tune (2010), notes that the character was meant to be real-life minister, Barbara Castle (1910-2002), 'but by the time the show opened [she] had moved to another ministerial posr, rendering the piece historical' (p.214).