OJ 14/23, [1] Handwritten postcard from Seligmann to Schenker, dated April 1, 1902

Seligmann invites Schenker to an evening of chamber music at his place.

OJ 70/35, [2] Handwritten letter from Schoenberg to Moriz Violin, dated April 10, 1902

Schoenberg rarely goes to the [Buntes] Theater. He insists on receiving a report from Violin on a performance of his Verklärte Nacht.