OJ 9/18, [2] Typewritten letter from Wilhelm Bopp (Akademie für Musik) to Schenker, dated January 14, 1911

Bopp regrets that he was unable to attend Schenker's chamber music concert.

OC 52/62 Typewritten letter from Hertzka (UE) to Moriz Violin, dated January 19, 1911

Hertzka regrets having missed Moriz Violin's concert, and asks for a list of recipients for his booklet Ueber das Continuo.