He remained healthy in his old age, which he attributed to regular walks no matter the weather, and always getting enough sleep. He had a great appetite and could read without glasses but his hearing was declining since his youth and he developed problems with rheumatism. He remained active and lucid, continued his reading, writing and correspondences until his death. The numerous notes that he made during these years, amongst others on aging, were published posthumously under the title "Senilia". In the spring of 1860 his health started to decline, he experienced shortness of breath and heart palpitations; in September he suffered inflammation of the lungs and although he was starting to recover he remained very weak. The last friend to visit him was Wilhelm Gwinner. According to him, Schopenhauer was concerned that he would not be able to finish his planned additions to "Parerga and Paralipomena" but was at peace with dying. He died of pulmonary-respiratory failure, on 21 September 1860 while sitting at home on his couch. He was 72.