The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
A Young Woman Seated at a Virginal. National Gallery. Card No. 1334. Johannes Vermeer
National Gallery. Children Making Music. Molenaer. Jean. Card No. 1331
The Thames below Westminster. National Gallery. Card No. 1465. Monet. Claude Oscar
A Herdsman with Cows by a River. National Gallery. Card No. 1603. Aelbert Cuyp. 1989
Salisbury Cathedral and Archdeacon Fisher House. from the River. National Gallery. Card No. 1607. John Constable
The Parting of Hero and Leander. National Gallery. Card No. 1002. Joseph Mallord William Turner
A Herdsman with Cows by a River. National Gallery. Card No. 1603. Aelbert Cuyp
Rubens Peter Paul 1577 1640. An Autumn Landscape with a View of Het Steen. The national Gallery. Card No. 1313