English School, (18th century). Medium: engraving. Date: 1792. Published in "Illustrated History of England, Vol.5", 1792. A masked ball took place at the Royal Opera House in Stockholm at midnight on 16 March 1792. Gustav had arrived earlier that evening to enjoy a dinner in the company of friends. During dinner, he received an anonymous letter that contained a threat to his life. Provenance: Private Collection.