He suffered from weakness, dizziness, inability to concentrate and painfully swollen legs. Since diagnosis was uncertain in Haydn's time, it is unlikely that the precise illness can ever be identified, though Jones suggests arteriosclerosis. The illness was especially hard for Haydn because the flow of fresh musical ideas continued unabated, although he could no longer work them out as compositions. His biographer Dies reported Haydn saying in 1806:  "I must have something to do—usually musical ideas are pursuing me, to the point of torture, I cannot escape them, they stand like walls before me. If it's an allegro that pursues me, my pulse keeps beating faster, I can get no sleep. If it's an adagio, then I notice my pulse beating slowly. My imagination plays on me as if I were a clavier." Haydn smiled, the blood rushed to his face, and he said "I am really just a living clavier." The winding down of Haydn's career was gradual. The Esterházy family kept him on as Kapellmeister to the very end (much as they had with his predecessor Werner long before), but they appointed new staff to lead their musical establishment: Johann Michael Fuchs in 1802 as Vice-Kapellmeister and Johann Nepomuk Hummel as Konzertmeister in 1804. Haydn's last summer in Eisenstadt was in 1803, and his last appearance before the public as a conductor was a charity performance of "The Seven Last Words" on 26 December 1803. As debility set in, he made largely futile efforts at composition, attempting to revise a rediscovered "Missa brevis" from his teenage years and complete his final string quartet. The latter project was abandoned for good in 1805, and the quartet was published with just two movements. Haydn was well cared for by his servants, and he received many visitors and public honors during his last years, but they could not have been very happy years for him. During his illness, Haydn often found solace by sitting at the piano and playing his "Emperor's Hymn". A final triumph occurred on 27 March 1808 when a performance of "The Creation" was organized in his honour. The very frail composer was brought into the hall on an armchair to the sound of trumpets and drums and was greeted by Beethoven, Salieri (who led the performance) and by other musicians and members of the aristocracy.