December 1846 – May 1847 he was second in command of Leichhardt's second expedition (Darling Downs to West Australia) in the party of nine: Leichhardt, Mann, James Perry (saddler), Heinrich Boecking (tanner and baker)[a] Henry Turnbull, Hovenden Hely, Daniel Bunce (botanist), and two Aboriginals: Harry Brown and Jemmy Wommai or Wamai. The expedition was abandoned at Peak Range (near present-day Emerald) after sickness overcame much of the party.
Leichhardt blamed failure of that expedition on the "effeminacy" of his men.[4] Mann responded to Leichhardt's allegations in a newspaper article[5] 20 years later and a book[b] after 40 years.[7]
In 1848 he joined the NSW Survey Department, and surveyed a large portion of the State. He was an authority on matters relating to the early history the colony and the aboriginals.
On 16 April 1857 Mann married Camilla Victoria Mitchell, third daughter of Sir Thomas Livingstone Mitchell.[1]
They had a daughter Mary, who married William Welsh on 28 September 1872[8] and two sons: Livingston F. Mann,[9] of the Lands Department and G. V. F. Mann, secretary to the National Art Gallery.
^According to one report, the only one from Leichhardt's earlier expedition.[3] This has not been corroborated. That party consisted of Leichhardt, James Calvert (2-I-C), Charles Fisher and Harry Brown (Aboriginal aides), John Gilbert (ornithologist, speared to death; Calvert and Roper survived their wounds), John Roper, John Murphy (16yo), William Phillips (ex-convict), Christopher Pemberton Hodgson, and Caleb (African-American). Hodgson and Caleb left the party 3 November.
^Mann's Eight Months with Leichhardt may have been colored by (father-in-law) Mitchell's jealousy of Leichhardt's successful journey Moreton Bay to Port Essington.[6]
References
^ ab"Family Notices". The Sydney Morning Herald. Vol. XXXVIII, no. 5893. New South Wales, Australia. 25 April 1857. p. 1. Retrieved 29 March 2024 – via National Library of Australia.
^"Leichhardt". Townsville Daily Bulletin. Vol. LXVII. Queensland, Australia. 14 August 1945. p. 3. Retrieved 29 March 2024 – via National Library of Australia.
^"Leichhardt's Fate". The Courier-mail. No. 1610. Queensland, Australia. 29 October 1938. p. 4. Retrieved 29 March 2024 – via National Library of Australia.
^John F. Mann (10 February 1866). "Leichhardt's Last Letters". The Ballarat Star. Vol. XI, no. 36. Victoria, Australia. p. 4. Retrieved 29 March 2024 – via National Library of Australia.
^"Enigma of Leichhardt". The Canberra Times. Vol. 43, no. 12, 111. Australian Capital Territory, Australia. 21 September 1968. p. 15. Retrieved 29 March 2024 – via National Library of Australia.
^"Reviews". The Brisbane Courier. Vol. XLIV, no. 9, 415. Queensland, Australia. 19 March 1888. p. 3. Retrieved 29 March 2024 – via National Library of Australia.
^"Family Notices". The Argus (Melbourne). No. 8, 207. Victoria, Australia. 30 September 1872. p. 4. Retrieved 29 March 2024 – via National Library of Australia.
^"Obituary". The Sydney Morning Herald. No. 29, 776. New South Wales, Australia. 9 June 1933. p. 15. Retrieved 29 March 2024 – via National Library of Australia.