Fouquet

Nicolas Fouquet (1615–1680), Louis XIV's superintendent of finances, whose château of Vaux-le-Vicomte and the lavish fête given there on 17 August 1661 preceded his arrest at Nantes in September 1661 (Wikipedia, «Vaux-le-Vicomte»). He is not a person in Marie's life but a comparison: on 1875-08-11 (038.0265), told by a Worth saleswoman of the riches of the couturier's house at Suresnes, she writes «comme on disait Vaux à M. Fouquet, on dit Suresnes à M. Worth». Worth's villa at Suresnes was built in 1865–69 (Wikipedia and Suresnes street history, as cited in the RSR note on the paragraph; a reader footnote there explains the allusion). See #Worth.