The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Chatsworth House. Postcard. 1912
Chatsworth House. Postcard
Petworth House. F. Frith. Postcard
Chatsworth House. Frith
Chatsworth House. Friths Series. No. 18643B
Chatsworth House. Boots. Postcard
Chatsworth House. F. Frith. No. 18643. A. 1911
Chatsworth House. F. Frith. No. 18646 A