| Ref No | WIA GC/1889/14 |
| Title | Hartz, Otto and Ruben, Paul to Warburg, Aby 12/06/1889 |
| Writer | Hartz, Otto; Ruben, Paul |
| Place1 | Bonn |
| Recipient | Warburg, Aby |
| Place2 | Ostend, Hotel Fontaine, Belgium |
| Date | 12/06/1889 |
| Format | manuscript, pen drawings, postcard |
| Contents | birthday greetings from Hartz and 'beer witness' Paulus |
Show related Persons records.
Persons
| Code | PersonName | Dates |
| DS/UK/9 | Ruben; Paul (1866-1943) | 1866-1943 |
| DS/UK/32 | Hartz; Otto; Dr. | |
| DS/UK/2245 | Warburg; Aby Moritz (13/06/1866-26/10/1929); Professor, Dr. | 13/06/1866-26/10/1929 |