Eugen Bleuler's letter of recommendation for Carl Gustav Jung's appointment as a lecturer In January 1905, Eugen Bleuler (1857-1939) wrote a letter of recommendation to the Medical Faculty of the University of Zurich, urging them to accept the application of Carl Gustav Jung (1875-1961) as a lecturer there. Bleuler's letter mentions the contribution to Jung's writing made by Franz Riklin (1878-1938), although he does not define it precisely. It is safe to say that, judging from the way in which Bleuler expresses his opinions in this letter, this may be regarded at the very least as an early sign of his receptiveness to the psychoanalytical ideas of the time.