Cassidy was a university proctor at the Church of England's General Synod from 1999 to 2005 and has been a non-residentiary canon of Durham Cathedral since 2001.

He narrowly escaped being sent down when a university proctor caught him in charge of a Mercedes motor car he had been lent for the day by his friend the young Duke of Grafton.

He was university Proctor in 1595.

In 1566 he was university proctor, and the next year preacher before the university on the Lady Margaret foundation.

He was elected university proctor 10 April 1583, proceeded B.D. 6 July 1584, and D.D. 6 July 1590.

In 1637 he was chosen senior university proctor.

On 7 April 1630 he was chosen a university proctor, and he spent the remainder of his life in Oxford, devoting most of his time to gardening and the raising of fruit-trees.

He was university Proctor in 1867, and became Keeper of the Archives in 1885.

A native of Cornwall, Arundel was a fellow of Exeter College, Oxford from 1421 to 1430, and served as university proctor in 1426.

He was Fellow of St. Catharine Hall, Cambridge, university proctor, and chaplain to Archbishop George Abbot.