A follow on from the wonderful help from Hallmark I have just located on Trove:
Mr. Robert Speers, of St. Marys, will celebrate his 80th birthday today. Mr. Speers was born in Londonderry, Ireland, on July 13, 1852, and arrived in Tasmania in 1873. He followed farming pursuits near St. Marys until six years ago, when he removed to the township. Mr. Speers married Miss Elizabeth Hardley in Christ Church, Cullenswood, on July 13, 1877, Rev. Evans being the officiating clergyman, and there was a family of fourteen -five daughters and nine sons. Two sons served in the Great War, and visited Ireland while on leave. Mrs. Speers died 18 years ago, and one son and three daughters are also deceased. The youngest daughter (Ivy) keeps house for her father. Mr. Speers still enjoys good health and has a good memory. His hobby is gardening. His only surviving sister is Mrs. James Dawson, Castledown, Ireland.
So it is a confirmation Isabella is definitely his sister who married James Dawson. Date of birth was given as 13 July 1852 and not 1854 as first thought.
Cheers
Judi