I have just come 'on board' and discovered your note on the Whiteside families from Sligo.
I have in my line Elizabeth Whiteside, it says on her death cert 'born Sligo' and I working it back to say circa 1809. She married a Thomas Stewart in Sligo circa 1835.
They then came to NSW Australia with a young family approx 1843 onwards. I cannot find shipping records as to exact dates at present.
Thomas is my Gt Grandfather and we have the family history for out here in Australia, but sadly nothing for Ireland.
It does state Elizabeth's Father was John Whiteside and Mother was Sarah Dickson/Dixon Thomas's parents were James Stewart/Mary Ann Cummings.
Would you have any of these names in your files on these families at all?
I look forward to hearing from you in due course.