Thomas de Chaddesworth

He almost certainly compiled the cartulary "Crede mihi", the oldest surviving register of title deeds in the possession of the Archdiocese of Dublin.

[7] In 1284, shortly after he became Dean of St Patrick's, he claimed that he had been put to great expense and exposed to personal danger when travelling to London at the request of the late Archbishop, John de Derlington, (apparently, this was the first stage of an aborted mission to Rome) and in consequence, he brought a lawsuit against William de Meones, the Archbishop's executor (later Chief Baron of the Irish Exchequer), claiming sixty pounds in compensation.

[3] He was a High Court judge, who sat on the Court of Common Pleas, (Thomas de Snyterby and John de Ponz were his colleagues), and served as acting Chief Justice of the Irish Common Pleas for a short time after the retirement on grounds of age and infirmity of Robert Bagod, the first full-time Chief Justice, in 1298.

[9] He presided as inquisitor at what was said to be Ireland's first heresy trial, of Philip de Braybrooke, a canon of Christ Church Cathedral, in 1310.

[6] His failure on the second occasion was due to the existence of a rival candidate put forward by the chapter of Christ Church Cathedral, Dublin, namely their Prior, Adam of Belsham.

[6] The Pope, Boniface VIII, was annoyed at being asked to choose between them, and ordered both candidates to stand down in favour of Richard de Ferings, the Archdeacon of Canterbury.

The stern visitation he carried out at Christ Church Cathedral, involving the expulsion of his former rival Prior Adam, suggests that he was still smarting from his humiliation at failing to become Archbishop.

On the whole, however, he made a sincere effort to heal the bitter and longstanding breach between the two chapters,[1] with the full support of Archbishop Ferings, a mild and conciliatory man.