
letter to his friend Martín Zapater https://www.wikidata.org/wiki/Q3915977 and https://nl.wikipedia.org/wiki/Bestand:Francisco_de_Goya_-_Portrait_of_Mart%C3%ADn_Zapater_-_Google_Art_Project.jpg, n.p. Madrid, 10 November 1790, at Christies website
The illness (probably chickenpox) of his only surviving son, Francisco Javier, also meant that Goya would be kept from his duties as 'pintor da camara' at the palace, because of forty days quarantine. http://www.christies.com/lotfinder/Lot/goya-y-lucientes-francisco-de-1746-1828-autograph-4939859-details.aspx
1790s