There is another Benjamin Bowater who comes up.
Convict records:
Benjamin Bowater, b 1816
Conviction at Warwick Assizes, Stealing From the Person
Arrival: 26 Oct. 1838, Van Diemen's Land, per Coromandel
Death Date 11 Aug. 1875
Marriage:
Benjamin Bowater, Mary Ann Garven
1850/5561, Victoria, Australia
Transcription of gravestone at Melbourne General Cemetery.
In memory of Benjamin BOWATER Native of Birmingham who died 11 Aug 1875, age 62 yrs also Mary Ann the beloved wife of the above died 1 Jun 1884, age 56 yrs.
His will mentions a brother: Daniel Bowater
There's a few mentions of his property ownership in Victoria
So I assume he's the chap travelling for Tasmania to Melbourne.
And I cannot see a relationship with the Benjamin you are searching for.
Judith
