This jewel and another in the Rothschild Collection (lot 56) appear in a watercolour by Jean-Baptiste Fortune de Fournier (1798-1864). This is extremely important in helping to date the entire group of jewels by André. Fournier was born in Ajaccio and died in Paris. He worked as watercolourist for Napoleon III and exhibited at the Salons of 1843 and 1864. Eight interior views of The Tuileries are recorded by him as well as a portrait of Napoleon III. He was awarded the Legion d'Honneur. The watercolour illustrating the Rothschild jewels was included in the sale of some of the contents of the château de Ferrières near Paris, the home of Baron James de Rothschild and his successors, which was re-built by Sir Joseph Paxton between 1853-63.