The Association for the Study and Preservation of Roman Mosaics , (ASPROM), this is the society that looks at Roman mosaics found in Britain. Worth looking if you're interested in the ones found here, there are a number of resources on the website too. http://www.asprom.org/
Maenad and Satyr, Antioch, modern day Turkey. From a villa dated to the end of the second, beginning of the third century CE found on the slopes of Mount Pieria.
Look at the Dancing Maenad's dress and see the way the have set the tesserae to represent the folds of her dress. A very good example of using the Convergence Rule to represent the way fabric moves around a figure.