A handwritten version of this text exists, as well as a version in a hectographed brochure: „Im Nebel. Hrsg. von den Mitarbeitern, Tel Aviv, 1945“. The brochure is self-published. One copy is in the estate of Paul Engelmann in the Brenner Archive in Innsbruck, another copy in the German National Library, where an electronic reproduction is also available online (URN: urn:nbn:de:101:1-2013100125551). In addition to Schächter’s „Lehre und Irrlehre“ (7–16), the brochure also contains „Im Nebel“ by Joseph Markus and „Ein verfehlter Versuch“ by Paul Engelmann. The handwritten text is dated 1943 and is owned by Friedrich Stadler. In the upper left corner Schächter has written: „Dem Andenken Moritz Schlicks (1882–1936)“. The following reproduction reprints the hectographed text, the deviations from the handwritten text are noted in footnotes as „HS“.