Career
More is known about him than about many of his colleagues, from which we can form some idea of the life of an Irish judge at the time. He sat in turn in each of the Irish Courts of common law, and unusually, he is known to have appeared in Court as an advocate even after he became a judge. He was a native of Grantchester in Cambridgeshire, his surname being the older form of the town"s name (it appears as Grauntsethe in Domesday Book).
He seems to have been in practice as a lawyer by 1300 and in 1302 was nominated by the Bishop of Ely to be his attorney.
He also owned property in Castle Street and at Oxmantown. His property by the bridge included the Dublin "fish-house" for the upkeep of which he was responsible.
He was given a licence to pierce the city wall to provide his house with light. He continued to practice law and was legal adviser to the owner of Rathfarnham Castle in 1320.
In 1326 he was made second Baron of the Court of Exchequer (Ireland) and the following year transferred to the Court of Common Pleas (Ireland).
His career suffered a serious reverse due to a curious episode in 1329 when the former Chief Baron of the Irish Exchequer, Walter de Islip, was engaged in litigation with one William de London. Grauntsete appeared as advocate for de London. Behaviour which was most unusual, if not unique in the history of the common law.
He then proceeded to offend the judges by reading out letters of excommunication from the Papal Court.
He was charged with attempting to subvert the Royal authority in favour of that of the Pope, deprived of office, imprisoned and fined. King Edward III however soon granted him a pardon and he was restored to office.
The King seems to have thought well of him and invited him to England twice to discuss Irish affairs In 1331 he was transferred to the Court of King"s Bench (Ireland).
About that time he became custodian of Leixlip Castle, with the enjoyment of the manor and its fishery.
Technically for a serving judge to acquire property was an offence, for which he obtained another pardon. He was a noted benefactor of the Priory of Holy Trinity, now Christchurch Cathedral, Dublin. Grauntsete obtained licence to erect a chapel in Saint Michan"s Church, and also built Saint Mary"s Chapel on Dublin Bridge itself.
He was also a benefactor of the Hospitallers at Kilmainham and it was at Kilmainham that he spent his later years.
In return for his benefactions to the Priory he had a large suite of servants to attend him, three horses and the right to dine at the Prior"s table. He was still alive in November 1348, when he appears to have been in England, possibly in connection with the licence for Street Mary"s on the Bridge, which was granted the previous month.
