Arás an Uachtaráin: Michael D Higgins in his study at his official residence. Photograph: Brenda Fitzsimons It is striking that, in the course of a wide-ranging conversation in his study at Áras an Uachtaráin, Michael D Higgins mentions just one precise date: August 15th, 1946. He says these numbers in what seems an entirely unselfconscious way, as if to him they are just there, always, in his hea