The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
National Gallery. Landscape. River Scene. School of Patinir. Waterlow. Post Card No. 1123
Netherlandish School. Landscape. River Scene. National Gallery. Trustees under the authority of Her Majesty Stationery Office by Waterlow and Sons Ltd. London
National Gallery. Landscape. River Scene. School of Patinir. Waterlow and Sons Limited. 1942
The National Gallery. River Landscape With Horsemen and Peasants. Aelbert Cuyp
Patenir. Landscape. River Scene. B. Matthews
The National Gallery. River Scene. Monet. Claude Oscar
River Scene. National Gallery. Card No. 1450. Claude Oscar Monet
Winter Landscape. National Gallery Publications Ltd. Caspar David Friedrich. 1999