"Préfecture de la Seine. Direction générale des travaux de Paris. Service de l'inspection générale des carrières"--at head of title.
Estimated publication date based on the latest date cited in the book ("1937" on p. 21).
A fold-out map entitled "Trajet de la visite dans l'ossuaire" is bound in between pages 10 and [11], indicating the location of 12 ossuaries in Paris. When each one is described in the text, the number of the ossuary as it appears on the map is printed in the left-hand margin. The first edition of Les catacombes de Paris did not include a map.