I am starting a search for Bridget /Delia Waldon and William Murphy. They would have immigrated from Ireland to Ohio, U.S. between 1855-1858. It is unknown where in Ireland they came from, however family memory is that they came from County Cork, (unverified). All their children appear to have been born in the US, so they would have immigrated as a young couple (assuming they didn't meet in the US and get married.) William Murphy had a profession of Plasterer. Given such limited information, where would you suggest a start searching records in County Cork? I must admit to feeling dismayed with this difficult task, but hope to get lucky. Thank you very much in advance for any advice you can give me. Carol