Phyllis Ackerman examines the history of silk production and weaving in Iran's Caspian provinces (Gurgan, Tabaristan, Gilan, Dailam) using medieval Persian and Arab sources. She then analyzes the textile designs painted in the 1090 Andarz Nama manuscript in the Cincinnati Museum (foliated stripes, split acanthus bracts, peacock and dove patterns). She links these to surviving silk twills from Rayy, Brussels, the Musée de Cluny and Canterbury Cathedral, and to designs in Echternach codices, arguing for a Caspian-European silk trade. Footnotes cite Persian, Arabic and European sources.