Editing Julius Petersen (section)

==Last years==
In the spring of 1908 Petersen suffered a stroke. Even in this condition his optimism and desire to work did not stop. In a letter to [[Gösta Mittag-Leffler|Mittag-Leffler]] in Stockholm he wrote: ''“I feel in all respects rather well, it is only that I cannot walk and have difficulties in talking. However, I hope to get so far this summer that I can resume my lectures in the autumn”.''  His last two years became a period of physical and mental debility, where, towards the end, he hardly had any memory left of his wide interests and the rich work which had filled his life. In 1909 he retired from his professorship. He died on 5 August 1910, having spent for five months in hospital. He was buried at [[Vestre Cemetery|Vestre Kirkegaard]], where Copenhagen University cared for his grave until 1947.