| Description | 1. Unsigned, List of ?Birds, no date [found in P and Q Box 1899]
2. Illegible signature, 2 letters, written in German, sent from Agram [Zagreb], Croatia, 14 Jan 1899 and 28 Apr 1899
3. List of Philippine birds, unsigned, no date [found in Box S 1899]
4. Illegible signature [?Jordan], 1 postcard, addressed to Ernst Hartert, Zoological Museum, Tring, written in German, 14 Aug 1899
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