How to Know Higher Worlds 2014. The Bamford translation of "Knowledge of the Higher Worlds and Its Attainment" (CW 10) by Rudolf Steiner.
The alternate translation if also available on this website.
5. Requirements for Esoteric Training
7. Changes in the Dream Life of the Esoteric Student
8. Achieving Continuity of Consciousness
9. The Splitting of the Personality in Esoteric Training
10. The Guardian of the Threshold