After completing the handwritten Draft [Red Book], Jung had it typed and edited it.
On one manuscript, he made alterations by hand (I refer to this manuscript as the Corrected Draft). From the annotations on the Corrected Draft, it appears that he gave this to someone (the handwriting is not that of Emma Jung, Toni Wolff, or Maria Moltzer) to read.
That reader commented on Jung’s editing, indicating that some sections that he had intended to cut should be retained. ~Sonu Shamdasani, The Black Books, Vol. I, Page 42-43