In an email discussion at that time with Master Richard Wymarc, he informed me that the embroidery style depicted in these patterns seems to have died out completely in the 15th century. He is currently researching and writing like mad, in hopes of reviving this type of needlework. An extensive search of the Victoria and Albert Museum's Art History library and several discussions with the textiles curator have led him to believe that there are no real references on the subject, so he's in the process of writing his own.
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