Seeking Information Mary and Bridget Davin transported to Australia 1849

My great great grandmother Mary and her sister Bridget Davin were transported to Australia in 1849.   I have been able to trace Mary’s history from her conviction in Ireland to her death in Australia on 26 July 1906, the only difficulty I encountered there was trying to determine who her 2nd husband was  (his name was James Connors but there were 4 or 5 by that name transported at about the same time!! And by choosing the James transported on the Hyderabad in May 1849 I am hoping I have the right one now)  but without having more details I have not been able to find anything about the sisters in Ireland.

The convict records indicate that on arrival in Australia, Mary was 17, a former nursemaid, and Bridget was 19, a former housemaid.  Their father is listed as Thomas, but Mary’s death certificate shows his name as James and that he was a stonemason.

I have found information on the Ireland-Australia transportation database and also the Family Search site but it only relates to conviction and transportation.

It is possible that Mary’s middle name is Catherine but I have not been able to confirm that.

In one set of records I have found that they were transported for stealing 10 shillings from ‘Cornely’ with no previous offenses, but then I found that they previously stole 4 sheep for which they were jailed for 11 weeks (that seems a bit back to front!).

Following their trial on 4 Jan 1849 they were both received at Grangegorman Depot on 3 March 1849 and on 26 June 1849 departed Kingstown Dublin on the 'Australasia', arriving in Australia on 29 September 1849.

I have been trying to find actual records of their arrest and trial in the hope that this will provide me with more information to base my search on.

Any assistance you are able to give me would be greatly appreciated.

As an update, I believe Mary and Bridget Davin were from Sky Road, Bayleek near Clifden in the Parish of Omey and the Barony of Ballynahinch.  Although I have still not found any Irish records for Mary or Bridget, I do have very strong DNA connections to descendents of Michael Davin who was living in Salem, Harrison Country WVa and placed an advertisement in 1859 seeking his brother Patrick who was believed to have gone to Dubuque.  I have yet to confirm a DNA match with Patrick's line.