I am also researching Hourihan's from Skibbereen. My ggrandmother was Catherine Hourihan. Her parents, I believe were Murtagh Hourihand and Mary Barry Hourihan. They had several daughters: Catherine, Mary, Margaret, Julia and two unknown. Catherine and Mary emigrated to Hartford, CT in the late 1880s. Catherine was born in 1862. Have you come across any of these names in your Skibbereen family?
Thanks and Good luck.