Carl Jung signed holograph envelope, composed entirely in his hand. Jung signs the envelope at lower left, ''Ex. Prof. Jung'' with his address in Zurich, and addresses it to his mentee, the psychoanalyst Dr. Rivkah Scharf, at the Allerton Hotel in New York. Postmarked 11 April 1951 from Zurich. Jung refers to himself as an ''ex'' professor as he resigned his position after suffering a heart attack. Envelope measures 6.375'' x 4.5''. Tear along top edge from opening, overall very good condition.