File of correspondence with Aschenbrenner, which includes PBJ's first letter to her in 1980 asking for information on Hugo Häring for a potential new book. PBJ's letter are in English and Aschenbrenner's replies in German - mainly includes replies from Aschenbrenner. Also includes letters from Andrea Schmitz, enclosing cuttings and publications relating to Hans Scharoun, and in later letters reporting on Aschenbrenner's deteriorating health. Includes [original] typescript letters to Scharoun, sender unknown, dated 1950s, which possibly belonged to Aschenbrenner.