Late 1800's Spanish moiré marbling

 

I have to say I find these endpapers disturbingly rich, the fold effect is almost unfathomable, but they are (above and below) from a leather bound 1887 version of Milton, 'Paradise Lost and Poetical Works'.

Spanish moiré

This pattern is related to and a variation of the (typical) Spanish marble. It was created about the same time at the beginning of the 17th century. According to Muira the pattern is created starting with a Turkish base. A paper which has been folded in half diagonally and vertically (or horizontally and vertically) is laid onto the bath, moving slightly from side to side to create the curvilinear, gradations typical of this pattern.

Below: endpapers from 1870 Felix Mendelsohn, 'Songs Without Words Sheet Music for Piano'.

Above: example from 1887.

Above and Below: examples from the Bergen Library