Cobbler filling stitch
A pulled thread stitch creating negative spaces that resemble small windows.
A sequence of straight stitches over four threads of the canvas that form a series of squares
Method
Using a tapestry needle, bring the thread up to the surface and then back down over 4 threads of the canvas creating a vertical stitch
Make an identical parallel stitch 4 threads to the left increasing the tension during the up stitch to pull the fabric threads together
Repeat the parallel stitch 2 threads to the left, again increasing the tension during the up stitch
Repeat the parallel stitch 4 threads to the left, again increasing the tension during the up stitch
Repeat this sequence to the end of the row
Start the row below by bringing the needle up 6 threads below the bottom of your last stitch
Complete the row by working back in the opposite direction with the same vertical stitches over 4 threads, each stitch should be directly underneath those of the row above
Complete any further rows using the same sequence of straight stitches
To complete the pattern, join the previous vertical stitches with horizontal ones to create squares.
Cobbler filling completed using a white thread to pull the fabric threads together shows off the negative space created.

Common uses
Embroidery Techniques
Related Stitches
Identifying Cobbler filling stitch
Rows and columns of four threads pulled together to create a ‘window pane’ pattern in between each.
References
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Sarah Whittle, The Needlecraft Stitch Directory (2012)
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Mary Thomas’s Dictionary of Embroidery Stitches (1934) , p.50–1