Caron
Had a look at B&P Vol 2. Not an easy book to understand, especially how McClaughlin did his index!
Three of us were scratching our heads

Example: He indexes by surname only. There were six references to Mitchell. Three found, two for Sir Thomas Mitchell and one for someone else with the surname. Other 3 not found. BUT I did find her on another page altogether - just as well you knew she came on the Lady Kennaway!! [p.316]
The only info, though, apart from what you already have, is that her Religion was RC.
And the name of the employer was Mary Ann Iddler, not Iddles.
Oops, I see you already had the RC bit.
Of course, if you had the time to sit down and read through the whole book, you might pick up something else - given the strange nature of his indexing.
Remember that most of the extra info given about some of the girls was submitted by family members. I recall when Vol.1 was published, I wondered how he got the info on my orphan girls, then realised that I'd sent it to him years earlier

Do you know if she is inscribed on the Irish Famine Wall in Sydney? If she is, perhaps Dr Perry McI may have some info on her. Might be worth a query. If you don't know who I'm talking of, let me know and I'll PM her name to you. I might even have an email address, with a bit of luck.
Cheers
Dawn M