In 1924, the brothers Jan and Wim Leene became members of the American movement Rosicrucian Fellowship, founded in 1909 by Max Heindel. In 1929, they directed the head of the branch in the Netherlands. Joined by Henriette Stok-Huizer in 1930, they founded together an independent group in 1935 under the name of 'Rozekruisers Genootschap' (Rosicrucian Society); however, they fixed the official date of founding of the LR on 24 August 1924, in Haarlem. After the death of Wim Leene in 1938, Jan Leene and Henriette Stok-Huizer wrote the doctrine of the group, using pen-names: respectively Jan van Rijckenborgh and Catharose de Petri. Rijckenborgh published a book that is based on the seven letters mentioned in the Bible's book of Revelation and entitled "Dei Gloria Intacta".