WIA GC/1897/20 | Warburg, Aby to [Friedlaender, Max?] [1898] | he read Emil Vogel's entry in the 'Jahrbuch der Musikbibliothek Peters' on the 'Atti dell... |
WIA GC/1916/191 | Warburg, Aby to Friedlaender Max 03/09/1916 | he enjoyed reading the Goethe Jahrbuch with the article 'Goethe und die Musik'; wants to know... |
WIA GC/1916/192 | Friedlaender, Max to Warburg, Aby 06/09/1916 | thanks for letter [of 03/09/1916, extant] and greetings |
WIA GC/1918/239 | Friedlaender, Max to Warburg, Aby 12/07/1918 | asks Warburg's opinion whether [Wilhelm von] Beckerath would be suitable to produce illustrations... |
WIA GC/1918/240 | Warburg, Aby to Friedlaender, Max 14/07/1918 | recommends [Wilhelm von] Beckerath to be commissioned with producing the illustrations for a... |