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Persian flower, designed by Elizabeth Almond, from Blackwork Journey, finished as a scissor keeper.
Free Blackwork Tutorial - Blackwork embroidery was first thought to have come from Spain to England; where Catherine of Aragon, the wife of Henry the VIII made the embroidery style most popular for cuffs and collars etc during the Tudor period. This style of design was brought about as a cheaper version of lace around the period of 1509, as taxes on lace were high.
I have always loved blackwork. It was one of my favorites when I used to do a lot of needlework. Not sure I'll pick it up again but I do like it...
I think the swirly geometric design - second row, third in - would make a fascinating fill pattern.