Christian Rohlfs (Niendorf 1849 – 1938 Hagen). ”Köpfe”. 1922 Water-based tempera on wove paper. 70,5 × 52 cm (27 ¾ × 20 ½ in.). Monogrammed and dated lower right: CR 22. Vogt 22/3. The work is registered in the Christian Rohlfs archive, Osthaus Museum, Hagen under the archive number: CRA 228/22.– [3356] Provenance: Private Collection, Northern Germany