I've been doing quite a bit of research on Medieval embroidery, textiles, images, themes and culture to prep for the Medieval CQ. During my search I came upon a few blogs dealing with Medieval textile and embroidery, if you would like to take a peek.
http://bethsbluebellwood.blogspot.com/ She is doing an exhaustive examination of various embroidery stiches used during the medieval and later periods.
http://elmsleyrose.blogspot.com/ An embroidery, calligraphy and illumination blog. She is especially interested in 16th and 17th century embroidery but the illumination comes from earlier periods.
http://gina-b.blogspot.com/ This is a silkwork and passementerie blog out of the UK.
http://m-silkwork.blogspot.com/ A group blog about textiles and costumes of the late middle ages and early modern times.
http://baroqueembellishments.blogspot.com/ She is an embroiderer and pattern maker mostly interested in the Elizabethan and Renaissance eras.
On a post in July on Baroque Embellishments Kimberly was all excited about discovering an online copy of a book, published in 1606, by ThomasTrevelyon (or Trevelian).It was pretty exciting to me, too! It is on the Folger Shakespeare Library website and, beginning on page 7 (scroll down) there are quite a few pages of designs for blackwork embroidery. A later edition (1616) is described on Maggs Rare Books and contains a quite extensive history of Thomas and descriptions of his books.
It was in this book that I finally distilled the design I wanted on the focal piece. On this design for a coif (cap) I found the perfect shape for the corners of the focal piece, with the added bonus that it incorporated a fleur-di-lis, an image I wanted to have on the final CQ banner.
I traced the focal piece on to some graph paper and then transferred this design to all four corners of the outline on the graph paper.
It needed some adjusting but I played with it for awhile and this is where it stands now:
I like it!!