Egon Spengler him, which leaves him a little flustered. He celebrates his 40th birthday during this series, which would put him in his late twenties when "The Real Ghostbusters" began. Age is the largest factor causing Spengler to having transition from active ghost hunting to a mentorship role; in one episode where the original Ghostbusters guest starred on an episode the audience clearly sees middle adulthood has affected the speed and weakened the stamina of the original Ghostbusters. Although Egon Spengler does not appear in the 1990 "The Earth Day Special", his character and status as a Ghostbuster is mentioned, and Harold
Hans Egon Holthusen correspondence (encompassing more than five thousand letters), genealogical records, and a photographic archive) are preserved at the Library of the University of Hildesheim (Universitätsbibliothek Hildesheim) in Lower Saxony (‘The Papers of Hans Egon Holthusen’ — "Nachlass Hans Egon Holthusen"). The Library of Congress in Washington, D.C., holds a sound recording of the lecture on post-war German literature, entitled ‘Crossing the Zero Point’, which he delivered in the Coolidge Auditorium of the Library of Congress on January 25, 1960 (and which he begins by mentioning ‘the German catastrophe of 1945’, "not" that of 1933). Hans Egon Holthusen Hans Egon Holthusen (April