Autograph quotation signed.
Oblong 8vo (postcard). 1 page.
Inscribed to the German dermatologist Alwin Scharlau: "'Rust baart lust' [...] Zurück auf eine alte Leidener Weis".
One of the leading German watercolourists, Bartels specialized in maritime scenery, excelling in storm scenes and motifs of fishing life, and was a pioneer of large-scale watercolours.
Self-addressed by the collector on the reverse. The Mecklenburg physician Scharlau (b. 1888) assembled a collection of artists' autographs by personal application.