Searching any information Margaret Lynaugh b. circa 1834

I am searching for any information about Margaret Lynaugh(and variants- Lynagh, Lynach, Lyneth....)

Margaret was born circa 1834 in County Cork. I do not have a mother or father named yet for her.

Margaret had 2 younger sisters, Betty, who married a Kane, and Mary who married a Murray.

Margaret's mother died sometime before 1850. She worked for a wealthy family before her death, and after her death, Margaret worked for the same family to help support her sisters. Guessing father must have been dead too at the time.

This family had a daughter named Ellen, who was Margarets age, and the 2 had been friends since childhood. Apparently, Margaret came to America with the daughter of her employer, who was eloping against her parents wishes.

Ellen and her husband were married in NYC, and Margaret was a witness. Margaret then moved to upstate NY, where she worked as a cook in a hunting camp where she met ROBERT C. FULTON. They were married around 1856.

This is all I know about Margaret before she came to America. I realize it may be like finding a needle in a haystack, but I would like to know more about my 3x great grandmother and where she came from, and this looked like an excellent place to start!

Her husband Robert C. Fulton was also born in Ireland, but that will be posted somewhere else, as I don't know what county he came from.