Rehearsals for Mahler performances:

Richard Wagner, Tannhäuser (Orchestra Rehearsal).

The 267th evening of the season.

Richard Wagner, Tannhäuser (for the 8th time this season).

Pertinent newspaper articles from the following sources are in the archives:

Neues Wiener Journal, May 12, 1901 (Wien).
Deutsche Zeitung, May 12, 1901 (Wien).
Fremden-Blatt, May 12, 1901 (Wien).
Illustriertes Wiener Extrablatt, May 12, 1901 (Wien).
Neue Freie Presse, May 12, 1901 (Wien).