. McDunphy proved to be a difficult and complex Secretary to the President. A passionate believer in structure, he spent his period in office creating numerous rules and regulations. While the first president, the politically inexperienced
Douglas Hyde accepted his rules automatically, his successor, the more politically experienced former
Tánaiste,
Seán T. O'Kelly, who became president in June 1945, had a more fraught relationship with McDunphy and frequently baulked at following McDunphy's rules. McDunphy had a long-term impact on the presidency. His 1945 book
The President of Ireland: His Powers, Functions & Duties was seen as the bible of the office by those seeking to restrict the post and its occupant. His restrictions, which were viewed as correct (or, if not correct, useful in enabling them to control and restrict presidents) by later civil servants, led President
Erskine Childers to accuse one later Secretary to the President of having "the ghost of McDunphy behind you."
Mary Robinson as president ditched all of McDunphy's rules and in effect started from scratch. Commentators credited the ditching of McDunphy's rules as a key factor in the rebirth of the office and in its subsequent popularity. ==Government department==