Kathy, Haven't run into any Cassidys but several McLaughlins as I said. Never been there but hope to go someday. There are Gillilands in Culmore, north of Derry but I haven't been able to make the connection. My ancestors in Tully experienced quite a few deaths 1800-1810 and then I think a lease ran out. (Their landlord was Lord Londonderry) Anyway most had emigrated by the middle of the Nineteenth Century. Let me know about your trip and if you get to ask about Gillilands in Tully I'd appreciate it. Thanks, Tom Gilliland