This nice picture turned up on the Citroen 5HP forum. A ww1 Ford ambulance between two Citroen 5HPs at a girls college? Or ambulance drivers? The First cittroen has a license plate from the Rouen area.
I think you can go cycling in that quarry with a guide. Here an other picture from the quarry vehicles used to play around with by the local kids...in the village road.
I have seen a lot of vintage automobile documentation in the library of the Technical University of Aachen (D) (RWTH). This was in the time my brother studied there. I don't know if there has been digitalisation since.