KLERK, Willem de (1800-1876)? (Farmhouse on a pond). N.d. Drawing in pencil, ink and grey chalk. 175 x 204 mm. Monogrammed 'W de K' in r.l. corner. Mounted along margins, under passepartout. -- Added: Albrecht G.N.? (View of the Cauberg?). N.d. Drawing on paper in colour wash. 170 x 232 mm. Mounted along margins, under passepartout. Signed in pencil in r.l. corner. -- And 1 o. (3).