| 1. | Sold for £1,625 in 2012. Vendu chez Christie's pour 1 762 500 en 2009. |
| 2. | Most were sold at a well-publicized sale at Christie's two years after his death. La plupart furent vendues par Christie's deux ans après sa mort. |
| 3. | He also sold several pictures by auction at Christie's on 8 May 1916. Il cède également plusieurs photos par enchère à Christie's le 8 mai 1916. |
| 4. | His paintings are often sold by auction in Drouot, Artcurial, Christie's, and Versailles Enchères. Ses peintures sont souvent négociées chez Drouot, Artcurial, Christie's et Versailles Enchères. |
| 5. | Between 2002 and 2007 three of his cameras were auctioned by Christie's in London. Entre 2002 et 2007, trois caméras de Michel étaient vendues par Christie's à Londres. |
| 6. | "Post-War Works Shine at Christie's" Artnet News, 16 November 2000. Retrieved on 4 July 2007. ↑ « Post-War Works Shine at Christie's », Artnet News, 16 novembre 2000. |
| 7. | Christie's defines the term as ranging "from the 14th to the early 19th century". Christie's définit le terme ainsi : « entre le XIVe siècle et le début du XVIIIe siècle, ». |
| 8. | The contents of Hayter’s studio were auctioned at Christie’s, London, on 19 April 1871. Le contenu de l'atelier de Hayter est vendu aux enchères chez Christie's à Londres, le 19 avril 1871. |
| 9. | On July 25, 2008 part of the inventory of the castle was sold at Christie's in Amsterdam. Le 25 juillet 2008, une partie de l'inventaire du château est vendu chez Christie's à Amsterdam. |
| 10. | His Holiday Inn Hotel 'Seeking The Heights’ was sold for $47,500 at a Christie's auction in 2010. Son Holiday Inn Hotel 'Seeking The Heights’ fut vendu $47,500 à une vente Christie's en 2010. |