His father, a long-serving member of the Victorian Legislative Council, had arrived in Australia in 1833; he was born on an extended visit home.
[1] Mitchell eventually established his own practice, frequently appearing before the Supreme Court of Victoria.
After Federation in 1901, Mitchell made regular appearances before the High Court and occasionally before the Judicial Committee of the Privy Council in London.
He played interstate tennis for Victoria in 1886 and 1887, and was a founding member of the Royal Melbourne Golf Club.
He was defeated by Stanley Bruce, a future prime minister, and was apparently let down by his poor public speaking.