Griffiths Valuation for 1860 lists James Bell farming in Garvaghy, Errigal Keerogue. He had plot 54 which was a farmhouse, outbuildings and just over 32 acres. I also noticed an Alexander Bell on plot 36, a 46 acres farm, so he might well be related. Plot 54 today is up a dead end lane off the modern Garvaghy Rd which is just off the A5 at Radergan Rd.
http://www.askaboutireland.ie/griffith-valuation/index.xml?action=nameSearch
The valuation revision books show that James Farm changed hands in 1864, suggesting either that he had left or died. A Wm Conroy was the new tenant.
http://www.proni.gov.uk/index/search_the_archives/val12b.htm
Death registration only started in 1864 so if he died before that it won’t be in the statutory records. There is a death of a JB regd in Dungannon on 3.5.1868 aged 79 and another on 15.11.1868 aged 78. They could be him.
Errigal Keerogue COI records start in 1812, and there’s a copy in PRONI in Belfast.
There was still a Bell farm in Garvaghy in 1901. Presumably descended from Alexander. (The revaluation records should show). They were Presbyterian (indicative of Scottish origins).
http://www.census.nationalarchives.ie/pages/1901/Tyrone/Errigal/Garvagh…