I read your message and noticed some similarities with some research that I have been doing. Thomas Tyrrell lived in Maitland, NSW; he had emigrated with his wife Esther in 1841. They had four children (Joseph, John, Thomas and Andrew) NSW Births/Deaths/Marriages lists the death of Esther in 1851 and the marriage of Thomas and Ellen Mullarney in 1852. (This is the beginning of the confusion around the spelling of her last name). Sometime later, Thomas and family moved to Warwick, Qld where he established himself as a Soap Manufacturer. Thomas was killed in a horse accident in 1867. In 1870, Ellen Tyrrell married Timothy Dwyer (as listed in Qld BDM). When she died in 1916 (Qld BDM) her parents are listed as John Mulleray and Ellen.
I wonder if this is the same person that you are researching?