"Jackman arrived in Australia in 1835 as a member of the crew on the convict ship John Berry. His account of his adventures during six years in Australia or in Australian waters, indicates that, due to his rebellious and cocksure nature, he was in constant conflict with authority. The dramatic turn of events, in which he invariably figures as triumphant protagonist, suggest that the narrative is at least exaggerated." (Walsh and Hooton 85).
Source
Walsh, Kay and Joy Hooton. Australian Autobiographical Narratives : An Annotated Bibliography. Canberra : Australian Scholarly Editions Centre, University College, ADFA and National Library of Australia, 1993.