Yes, yes and yes again! That is her! Transcribed form the shipping lists at Public Records Archive Victoria:Arrived as assisted migrant Margaret O'Halloran on the Lady Kennoway in Feb 1850, travelled alone; came from Ennis in Co. Clare; She was RC, could read and write, and was in possession of a Bible; listed occupation as housekeeper; was joining her married brother in Geelong. The "travelled alone" means that she was not listed with family members but rather with all the other single ladies. I have some documentation also. Contact me at my e-mail please.