The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Blackwell. The Sanatorium South Front. Messenger Series. Post Card
Benenden Sanatorium from South West
Polesden Lacey. Surrey. The South Front. 1967
Cambridgeshire. Wimpole Hall.The South Front. National Trust. Larkfield Printing Company Limited
A hearty Greeting. Durban from the Sanatorium. S. E. C. D
Kedleston Hall. The South Front. English Life. 1988
Buckinghamshire. Winslow Hall. The South Front. ABC Historic Publications. A Jeremy Whitaker
Derbyshire. Sudbury Hall. The South Front. Colin Richardson Printers Limited. Jeremy Whitaker. The National Trust