GA 69a
| Date | Title | City |
|---|---|---|
| 24 Feb 1911 | The Spiritual World and the Future of Man | Winterthur |
| 19 Mar 1911 | How is Theosophy Refuted? | Pforzheim |
| 25 Mar 1911 | How is Theosophy Justified? | Pforzheim |
| 25 Nov 1912 | Truths of Spiritual Research | Munchenstein |
| 27 Nov 1912 | Errors in Spiritual Investigation | Munchenstein |
| 19 Feb 1913 | Errors of Spiritual Investigation | Stratford |
| 16 Feb 1913 | Results of Spiritual Investigation for Questions of Life and the Riddles of Death | Trieste |
| 17 May 1913 | Results of Spiritual Investigation for Questions of Life and the Riddles of Death | Stratford |
| 01 Mar 1913 | Spiritual Science and Natural Science in Relation to the Riddles of Life | Jena |
| 03 Mar 1913 | Spiritual Science and Natural Science in Relation to the Riddles of Life | Frankfurt |