Mrs Lantz refers firstly to the group: Mosaics. Then the stitch: a flat. Refer to page 99. The design is a border pattern.

This is my fifth sampler. I’ve used four shades of Appletons crewel wool, and varied the thickness of the threads to create a more pronounced effect for some of aspects of the pattern.

She states the source design is inspired by Norman-Moorish medieval pavement mosaic, at La Capella Di Sam Pietro, Palermo. The photographs below can be found on Wikipedia and provide an example of a mosiac pavement design. The photograph was taken by Berthold Werner.