The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Blenheim Palace. Green Writing Room and Blenheim Tapestry. Jarrold
Blenheim Palace. Green Writing Room. Photochrom
Blenheim Palace. The Green Writing Room. Photo Precision
Blenheim Palace. The Green Writing Room. Photo Precision Ltd
Blenheim Palace. The Green Writing Room. Photo Precision. St. Ives. Huntingdon
Green Drawing Room. Blenheim Palace. RA. No 9852. RP
Blenheim Palace. The Green Drawing Room. F. Frith