Ephemera 3 › HS 1010 - Note Paper of the Valley of Rocks, Linton, North Devon, published by Rock of London, plate number 1500 1st December 1850. Image 1 of 1 HS 1010 - Note Paper of the Valley of Rocks, Linton, North Devon, published by Rock of London, plate number 1500 1st December 1850. £9.00 Single sheet of unused writing paper. Add To Cart Added! Single sheet of unused writing paper.