Looking for Black and Adams families in Dungannon

Hi,

I am trying to trace my husband's family.  According to Simcoe County, Ontario history books John Black (B 1824) and his wife Mary Adams came along with John's brother James (b 1802), and sisters Sarah (b 1811) and Isabella came from Dungannon, Co. Tyronne to Innisfil, Simcoe Co., Ontario.  I have been able to trace the families forward but have had no luck in finding out anything about their past  in Irish records.  Ten years ago I drove through Dungannon and there were still businesses owned by people named Black, but unfortunately no one was in the office at the Presbyterian Church we stopped by and I was never able to get any more information about the family.  Any help or ideas of where to try finding more information would greatly be appreciated.