I have yet to see Napoleon's hair! There's an empty case in a fab museum in LOndon (name suddenly escapes me) with an empty case of Napoleon's gun or sword, stolen 1920....I suppose thick dark Italiany hair may weather differently to Robespierre's, if it was browny/red-ish: red's the pigment that really seems to go totally - I've got some 1860's stuffed kittens and they've gone white!