Steve,

Thanks for the links.

The map i am looking for is about the Duchy of Warsaw, period 1807-1809, a bit later as you wrote.
I am analysing the "registre du premier régiment des chevau-légers lanciers de la garde Impériale" and I am trying to see whether these cavalrymen were coming from specific départements (as i was told that the horse chasseurs mainly came from boarder régions in France).
In the meantime, some city names are unreadable and i hope that such a map could help me write these names correctly. I have the maps from wiki which are helpfull already, but i hoped to find something with more détails. Nothing interesting to find in "le dépôt de la guerre" in Paris (I found a nice map there, but no administrative boarders to see on it)

Best regards,

Pierre