According to Hubert Richardson’s “Dictionary of Napoleon and His Times” (p.404), “It is a curious fact that exercise tended to increase N.’s girth, despite the doctor’s contention that his devotion to hot baths was the real cause. In his letters to Josephine he remarks this in several instances, as in one dated 13 Oct. 1806… where he says: ‘I have already put on flesh since my departure, yet I am doing in person twenty and twenty-five leagues a day, on horseback, in my carriage, in all sorts of ways. I lie down at eight and get up at midnight.’ Again, writing three days later, he says: ‘…fatigues, bivouacs and night-watches have made me fat.’ … [in a letter from 30 Jan. 1806, he wrote:] ‘The campaign I have just terminated, the movement, the excitement, have made me fat. I believe that if all the kings of Europe were to coalescw against me I should have a ridiculous paunch.’”