Roman Mobius Mosaics, A Myth??? Maybe

Still looking for some graphic of the supposed 3rd century Roman Mosaics that include a Mobius strip... and found another reference to them in :

Mathland: from flatland to hypersurfaces
By Michele Emmer


[click on the graphics to enlarge]


Then I found this from :


Classical topology and combinatorial group theory
By John Stillwell



So... somebody has it wrong....