Fore-edge paintingis the technique of painting the edges of the leaves of a book. From 1650 onward
binders practiced a new decorative method of fore-edge painting: floral scrolls or scenes were painted upon the fanned-out fore-edge of the leaves and concealed by a normal gilt edge when the book was closed;
they became visible only when it was opened. This decorative device was continued
in the 18th century, but by the late 19th century had begun to wane in popularity.
Thomas H. Horne, in his 1814 “Introduction to the Study of Bibliography,” gives credit to the Edwards of Halifax bindery for creating a “method of gilding … and decorating the edges of the leaves with exquisite paintings.” The Edwards firm was founded by William Edwards (1723-1808) and Horne says that he has seen “landscapes thus executed with a degree of beauty and fidelity that are truly astonishing, and when held up to the light in an oblique direction, the scenery appears as delicate as in the finest productions of the pencil.”
There were also the more elaborate double fore edge paintings, in which the fore edge hides not one but two paintings, one appearing when the leaves are fanned to the left, the other when they are fanned to the right. The split fore-edge painting reveals both scenes at once when the volume is laid open at the middle, as in the central image above.
Stately homes and ruins – whether classical or medieval – were popular subjects [then] Later in the 19th century, fore-edge artists turned to more natural, everyday scenes, such as views of docks or harbor fronts, busy with activity and enlivened by the presence of workers. Less common were scenes like the winter scene, bare branches being much more tedious to paint than green, leafy clouds of trees. The imaginative design[s], rich detail, and expert execution indicate artist[s] of the highest skill. [Source]