Margaret Sullivan/Stephen McGuinness

[wren]

I am looking for Margaret Sullivan who was the daughter of Mary and Jeremiah Sullivan. Margaret was born in County Cork c1805.
She married Stephen McGuinness in County Cork in 1825.
Margaret and Stephen had three children who were born in County Cork Edward 1826, Eliza 1828 and Joseph 1830.
The family then moved to County Offally and were in Clara for some years.
It seems that the family then moved back to County Cork as Stephen appears to have died in County Cork in 1845.
their other children Ellen, Elizabeth and John eventually moved to Australia with Margaret, all be it at different times.
We think that Edward, Mary and Joseph must have died sometime during these years as we have been unable to locate them.
Any news would be wonderful.
Wren.