the result of optical aids such as the camera obscura, camera lucida, and curved mirrors, rather than solely due to the development of artistic technique and skill. In a 2001 book, Secret Knowledge: Rediscovering the Lost Techniques of the Old Masters, Hockney analyzed the work of the Old Masters and argued that the level of accuracy represented in their work is impossible to create by "eyeballing it". Since then, Hockney and Falco have produced a number of publications on positive evidence of the use of optical aids, and the historical plausibility of such methods. Rolf Harris is an Australian entertainer. He is a musician, a singer-songwriter, a composer, a painter, and a television personality. In 2005 he painted an official portrait of Queen Elizabeth II, which was the subject of a special episode of Rolf on Art. Harris's portrait of The Queen was voted by readers of the Radio Times the third favourite portrait of her. The royal portrait was exhibited at Buckingham Palace, the Palace of Holyroodhouse in Edinburgh, and was exhibited on a tour of public galleries in the UK. In April–June 2003, the English visual artists often known as The Chapman Brothers, held a solo show at Modern Art Oxford entitled The Rape of Creativity in which "the enfants terribles of Britart, bought a mint collection of Goya's most celebrated prints – and set about systematically defacing them". The Francisco Goya prints referred to his Disasters of War set of 80 etchings. The duo named their newly defaced works Insult to Injury. BBC described more of the exhibition's art: "Drawings of mutant Ronald McDonalds, a bronze sculpture of a painting showing a sad-faced Hitler in clown make-up and a major installation featuring a knackered old caravan and fake dog turds." The Daily Telegraph commented that the Chapman brothers had "managed to raise the hackles of art historians by violating something much more sacred to the art world than the human body – another work of art" As a protest against this piece, Aaron Barschak (who later gate-crashed Prince William's 21st birthday party dressed as Osama bin Laden in a frock) threw a pot of red paint over Jake Chapman during a talk he was giving in May 2003. On May 5, 2004, a 1905 painting titled Garçon à la Pipe (English: Boy with a Pipe) by Pablo Picasso was sold for US$104,168,000 at Sotheby's auction in New