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 began to decline, and 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.
Schopenhauer's extensive writings from these years, including those on aging, were published posthumously under the title Senilia. As his health began to decline in 1860, he experienced breathing difficulties and irregular heart rhythms; despite recovering somewhat, he remained severely weakened. The last person to visit him was Wilhelm Gwinner;  according to him, Schopenhauer expressed concerns about not completing his planned work on Parerga and Paralipomena but found peace with his impending demise.