I'm currently reading Poundstone's book Fortune's Formula, and am up the the part which discusses the French mathematician Bachelier, and his thesis that the prices of stocks in the market follow a random walk. His thesis was published in 1900, and slept for quite some time until resurrected after his death in 1946. A bit of googling revealed that you can get his thesis here, in French. NUMDAM is apparently a project to provide digital versions of many old mathematics papers published in French journals. Cool.
Now, I'll have to dust off my high school French.