[2] After some years in London, he returned to Kilkenny, where he designed the Gaol, St. Canice's Church and the Psychiatric Hospital ("Lunatic Asylum").

[6] He died on 23 May 1850 at his home in Rosehill, Kilkenny[7] which he had also designed himself and is buried in St. Mary's Graveyard alongside his family.

[8] It is presumed that his father was William Robertson, a Scotsman who had come to Kilkenny from Aberdeenshire and had opened a nursery shop in High Street in 1765.

There is some confusion about his last name, his name appearing in the baptismal register of St. Mary's Church as "Robison"[11] as well as his enrollment at the Dublin Drawing School as "William Robinson".

His quatrefoils can be found in his sacral architecture as well as secular buildings built and remodelled by him[27] (see photographs of St. Mary's Church, St. Canice's Cathedral and Kilkenny Castle).