Identificationtitle(s): annotation. Object type: sketchbook sheet object number: rp-t-1964-226. A-6. Inscriptions / marks: annotation, handwritten: '50: 70 = 20: x'. Description: page 6 from a sketchbook with 13 leaves. Manufacture. Manufacturer: writer: willem witsen. Place of manufacture: amsterdam (possible). Dating: ca. 1897 - 1900. Physical features: black chalk. Material: paper chalk. Credit line: loan from the willem witsenhuis. Acquisition: loan 1964. Date: between circa 1897 and circa 1900.