I see on the shipping record that the Henry Gislingham who arrived on the 4 Nov 1857 was 11 years old so born c1846.
There is a death record for a Henry Gislingham in Sale Victoria 1882 age 36. So born c1846. Father Robert french, mother Anna Johan Phillips. Is this your Henry french Gislingham?
Do want to find out about his time in Oz or in England or both?
Henry French Gislingham married Jane Browne Victoria 1871