On the authors and works he enjoyed
>"In Linz, Adolf had started to read the classics. Of Goethe's 'Faust' he once remarked that it contained more than the human mind could grasp. [...] It is natural that, of Schiller's works, 'Wilhelm Tell' affected him most deeply. [...] He was profoundly impressed by Dante's 'Divine Comedy' [...] I know that he was interested in Herder, and we saw together Lessing's 'Minna von Barhelm'. He liked Stifter partly I suppose because he encountered in his writing the familiar picture of his native landscape, while Rosegger struck him, as he once put it, as 'too popular'"
p.181
>"Every now and then he would choose books which were then in vogue, but in order to form a judgement of those who read them, rather than of the books themselves. Ganghofer meant nothing to him, whilst he greatly praised Otto Ernst. [...] Adolf read Ibsen's plays in Vienna without being very much impressed by them."
p.181
>"As for philosophical works, he always had his Schopenhauer by him, later Nietzsche too"
p.181