Hello, just noticed this post!
yes Mary Creed arrived on the Elgin, birth date 18 march 1828 Ballinstona Uregare co Limerick. I know more about her early life and from what I gather, she has named one of her daughters after her sister and mother. Sister Catherine and her mother was Margaret.
Thank you to all have contributed on this thread... I didn't realise she died in 1881.