OJ 9/34, [16] Handwritten letter from Cube to Schenker, dated March 26, 1929

Cube is listening by radio to music being performed in Vienna. The two caricatures are his fellow composition teachers at Duisburg. Reports on his work at Cologne Conservatory: success with previous lectures, and forthcoming lecture series.

OJ 15/15, [39] Handwritten postcard from Weisse to Schenker, dated April 13, 1929

Weisse arranges to meet Schenker outside the Musikverein before a performance of Beethoven's Ninth Symphony.

OJ 15/16, [63] Handwritten letter from Weisse to Schenker, dated March 3, 1930

Weisse has delayed in replying to Schenker's recent letter because he has been corrected copies of his Clarinet Quintet and Octet, which he will submit to the City of Vienna Prize competition. He asks Schenker to help publicize the first performance of the Octet, at the small auditorium of the Musikverein, and asks for the addresses of Angi Elias and Marianne Kahn so that he can send them personal invitations. His wife is about to give birth to a second child, and he hopes that Schenker's personal doctor Julius Halberstam might also be interested in hearing the Octet.

OJ 15/15, [49] Handwritten postcard from Weisse to Schenker, dated November 28, 1930

Weisse is delighted by the chance to rehearse his forthcoming lecture at Schenker's apartment. His Sextet will be performed at the Musikverein in Vienna; he goes through a list of Schenker's circle of adherents who might be invited to his forthcoming lectures at the Central Institute for Music Education and Teaching in Berlin.

Diary entry by Schenker for 11 December 1915