The book Rose Anderson is reading before her conversation with Bill Hobart is part of the plot in, and the title of the very next episode, All She Leaves Behind by Patricia Neville.
The Snowy Hydro Scheme that Barbara Cornish says that her late husband worked on is the Snowy Mountains Hydro-electric Scheme in south-east Australia, the hydroelectricity and water irrigation project built between 1949 and 1974 which is Australia's largest ever engineering construction.