From The Second Empire, by Philip Guedalla
…as the family got strenuously on in the world, the young Louis seemed to sink steadily deeper into himself. It was an age in which dyspepsia was frequently taken for intellect; and when the First Consul brought peace to France and set up his little suburban Court at Rueil, his younger brother was mostly to be found regarding the boisterous relaxations of Malmaison with Byronic gloom.
Louis was of the melancholy stuff that unmarried uncles are made of. Indeed, the Emperor and his mother-in-law subsequently disagreed as to whether it was the study of Rousseau or his digestion that made him impossible. …
