The Co Derry priest, Father Oliver Crilly, brought out a book twenty years ago. It was a collection of some of his contributions to the BBC Radio Ulster series, Thought for the Day.  It has an intriguing title – Is it about a Bicycle?. Fr Crilly had been inspired by the Flann O’Brien book, The Third Policeman. The desk sergeant, who features in the O’Brien work, is inclined to ask every stranger who approaches him in the police station, “Is it about a bicycle?”  In one of his radio pieces, Fr Crilly found a bicycle angle to many aspects of…