Bishops and their Precedence

I believe bishops have their precedence because they are both *temporal* and *spiritual* barons. Some I years ago, I took the following note from the *Gentleman's Mag*. for a year between 1790 and 1800; I cannot say positively what year (for I was very young at the time, and unfortunately omitted to "note" it):— "Every Bishop has a temporal barony annexed to his see. The Bishop of Durham is Earl of Sudbury and Baron Evenwood; and the Bishop of Norwich is Baron of Northwalsham." Query, where may the accounts of the respective baronies of the bishoprics be found?