The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Castleton. Blue John Mine. Lord Mulgraves Dining Room. 1944
Derbyshire. Castleton. Blue John Cavern. Peter Pedley. P. R. Deakin. F. R. P. S
Castleton. Blue John Cavern. The Balancing Rock. E. T. W. Dennis. No. 6
Castleton. Blue John Cavern. Entrance to the Interior. E. T. W. Dennis. No. 1
Castleton. Blue John Caverns. Gatehouse Prints. Local History Cards. No. 430
Castleton. Blue John Cavern. Entrance to the Interior. E. T. W. Dennis and Sons Ltd. No. 1. Scarborough
Castleton. Blue John Cavern. 19 th century Mining Implements. E. T. W. Dennis and Sons Ltd. No. 2
Castleton. Blue John Cavern. Chrystal Waterfall. RP
