Ordnance Survey (1846-1862). The Belfast And Province Of Ulster Directory 1858-1859. According to Dean in his book on Ulster gate lodges the gate lodge to Derrievolgie House was built around 1858 by the architect Thomas Jackson. The house he states was built between 1856 and 1858 for Cranston Gregg who was at stages a builder, (Henderson’s Belfast Directory And Northern Repository 1846-1847) and by 1860 a ship owner. It was known as Derryvolgie House. This house was also the home of a tea and coffee merchant Forster Green who established Forster Green Hospital in 1895.