My wifer and I just returned from Sligo. Sorry to say there are few Hargadons left in Sligo. We managed to talk to a woman whose grandmother was a Hargadon and just passed away at 99. After a brief conversation comparing ancestors we figured our grandparents wer probably first cousins. There is a Sligo geneology organization but their records "only" go back to the mid 19th century. My great-grandfather Michael was born during the famine and his church, according to the women from the geneology organization, did not have records from that time. I dug up information from the internet and found that Hrgadons were in Philadelphia in 1800. Ancestry.com has a lot of information (for a fee). Google "Sligo landlords" and you can come up with free information but there are a lot of records to pour over. We are planning to go back next year and do a more extensive search.