PORTUGESE BORDER STITCH
 
After making a foundation of evenly-spaced Straight Stitches, weave another thread around them without piercing the fabric. Using a blunt needle such as a tapestry needle for the weaving makes it easier to avoid piercing the fabric. Bring the thread up at A and wrap it around the first two bars twice, ending at position B. Repeat up the ladder. Work the left side of the border the same way.