Guillaume Guillon supported the revolution and was a friend of Jaques-Louis David, who provides a tenuous connection to James Harvey d'Egville. Guillaume was renowned for his quick temper. When he believed some soldiers had insulted his moustache he drew his sword and several soldiers were killed in the brawl. Lucien Bonaparte intervened and as a result Guillaume was appointed director of the French Academy in Rome.
While in Rome members of the Guillon family were vividly portrayed in pencil by Jean Auguste Ingres. His draughtsmanship is crisp but Ingres' paintings almost breathe so it is great pity that none of this family became his subjects on canvas.
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| Guillaume Guillon LeThière |
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| Madame Guillon LeThière |
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| The Alexandre Guillon LeThière Family |
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| Auguste Guillon LeThière |



