Her novels describe eastern Australian terrain and wildlife in considerable detail. She was part of a wave of
nationalist Australian writing that gathered strength in the late 1930s and 1940s, and her work is generally described as having a landscape aesthetic. Although the horses and other animals in her books speak to each other, they are not
anthropomorphic and, particularly in the first two
Silver Brumby books, otherwise behave naturally. According to an interview with Tom Wright, the
Silver Brumby series arose from Mitchell's difficulties in finding suitable reading material for her daughter Indi, then 10 and being raised in some isolation on the Mitchell family property Towong Hill, a remote
cattle station in the Snowy Mountains. Set in the Snowy Mountains area of the
Australian Alps around
Mount Kosciuszko in southern
New South Wales and northern
Victoria, the
Snowy Brumby books recount the life of the pale
palomino brumby stallion
Thowra from his birth in
The Silver Brumby (first published 1958) to
Silver Brumby Whirlwind.
The Silver Brumby was the basis of a
film of the same name in 1993 starring
Caroline Goodall as Mitchell and
Russell Crowe as The Man. This film was also released under the title
The Silver Stallion: King of the Wild Brumbies. There is also a children's cartoon TV series of the same name, which uses some character names, but is a very loose adaptation of the books. Mitchell's other works of fiction are also set in the Snowy Mountains around
Thredbo and the
Cascade Hut and are populated by brumbies and other animals, native and feral. The brumby stories generally intersect geographically or thematically with the
Silver Brumby books, and various characters from the
Silver Brumby books may appear in the others. She often also illustrated her work with her own photographs. ==Awards and honours==