Nachgewiesen in:
British Library Manuscripts Catalogue Add. 12096
- Schreiber:Friedrich II. von Preußen
- Empfänger:Francesco Algarotti
- Ort:Berlin
- Datum:15. Sept. 1740
ROYAL AND OTHER AUTOGRAPHS, Chiefly of the North of Europe,- vi--.
ROYAL AND OTHER AUTOGRAPHS, Chiefly of the North of Europe,- vi--.