Some might have noticed that I've been away a couple of days - others knew that I've been to Paris until last Sunday
It wasn't only a pleasure trip: I did some researches in the archives of the Préfecture de Police de Paris, situated in the Hôtel de Police du 5ème arrondissement
The personal there was very friendly and extraordinary helpful ...
... but unfortunately the papers/sources I was mainly looking for weren't stored there (perhaps in the National Archive).