Hi Rick,
I was searching this website for Garret Byrnes and came across a Mary Cody - seeing as Cody is not a name seen very often perhaps this will be of some value to you - it is land ownership. Mary and three other female relatives owned land at Dungarvan around the mid 1860's. The website is free info so you may find something else there if this is not your Mary follow the link and scroll to the bottom you will see her.

http://www.cmcrp.net/Waterford/Landowner1.html

Warm Wishes Debbie