Hello,
Yes he married Mary Dowling in 1857, she was his second wife, the first marriage was before 1854 to Sarah Crane. His daughter Annie born 1863 is my ancestor. Some records have conflicting information for his birthdate, I'm thinking it's earlier than 1832, a bit of a wide range from 1826! I think the one to John and Deborah is the one you found that married in TAS in 1867 (?). The others are a possibility but I've got no idea! I am sure he had no middle name, it is never mentioned anywhere in SA records. His death certificate in 1896 has him aged 70 as does the death notice. But it seems people in those days had a very uncertain age!