Roger breaks the cemetery down into six sériés to which he assigns a name of one of the prominent graves in that area.
He uses a number system to identify 21 of the more notable gravesites.Roger et fils, In Le Champ du Repos Le Champ du Repos, ou Le Cimetière MONT-LOUIS, dit du Père Lachaise. . . two volumes. Paris: Lebegue, September 1816.