Telegram to Lydia Cassirer from Fieldmarshall von Hindenburg
Certificate to Lydia Cassirer the Honour Cross for Help in the War, Berlin 3 June 1918. page 1. page 2.
Certificate of Marriage for Isidor Cassirer and Lydia Kopelansky page 1. page 2.
Certificate in the name of the Führer and Reichschancellor, Honour Cross for War Help to Dr. Rudolph Cassirer, 13 July 1934