Complex sentence: On returning to England, the company appointed him to "Queen of the South," which he took to Australia; one of the passengers with Sir Charles Hotham travelling to take up apppointment as Governor of Victoria.
Split into simpler sentences: On returning to England, the company appointed him to "Queen of the South," which he took to Australia. One of the passengers on the "Queen of the South" was Sir Charles Hotham, travelling to take up apppointment as Governor of Victoria.