From Wege Zur Kunst
http://www.andreas-kunst.de/cass.html

The grave of Paul Cassirer
at the Friedhof Heerstrasse, Berlin. Picture by Androom (13 Aug 2000)
www.xs4all.nl/~androom/biography/p011729.htm

From cover of the book by Renate Möhrmann, “Tilla Durieux und Paul Cassirer, Bühnenglück und Liebestod, 1997. See http://www.steffi-line.de/nost_buehne/03d_durierux.htm

Source: Olle Kellerman

From left Paul Cassirer, Haym, Delius, Buths, Jelka. Source: http://upload.wikimedia.org/wikipedia/en/7/7a/Cass...lius-buths-jelka.jpg, viewed 24 Feb 2013.