Threaded herringbone stitch
This stitch is constructed from a line of herringbone stitch, with a thread woven over the crosses and under the length of the stitch. The threading can be done with the same colour as the original thread or a contrasting colour of thread.
For more background, see the entry for herringbone stitch.
For threading, use a tapestry needle. Bring the needle up to the right of the top intersections, just below the top of the stitching.
Slide the needle under the right diagonal stitch and over the left diagonal stitch, above the cross.
Continue sliding the needle under the stitches in the same way. At the end, take the needle through the fabric to the left of the top intersection.
For the second threading, bring the new thread up to the right of the bottom part of the herringbone stitch, just above the bottom of the stitching.
Structure of stitch
Jennifer Campbell, Ann-Marie Bakewell, Guide to Embroidery Stitches (2004) , p.124
Sarah Whittle, The Needlecraft Stitch Directory (2012) , p.127
Betty Barnden, The Embroidery Stitch Bible (2003) , p.76
Erica Wilson, Erica Wilson’s Embroidery Book (1975) , p.79