We see here over the arch that there is an inscription . It says Erected by the Bishop of Raphoe, 1626. It is very hard to make out now but the inscription takes shape better when viewed at a distance. The bishop at the time was Andrew Knox, a Scotsman. In 1857 during the Griffith's Valuation, this property was unoccupied. I think it was one of the bishop's houses.
Photo taken in May 2013