Soon after completing the Dissertation Playfair suffered a severe attack of a disease of the bladder which prevented him from continuing his planned second edition of the Illustrations and interrupted his lectures.
Malapit na matapos kinukumpleto ang disertasyon Playfair suffered isang matinding atake ng isang sakit ng pantog na pumigil sa kanya mula sa kanyang magpatuloy binalak ikalawang edisyon ng Illustrations at interrupted kanyang lektura.