T-blocks (pattern)
This pattern, when viewed horizontally, has the appearance of a capital ‘T’ or a bricked pattern with a diagonal line running through the centre.
It is a very detailed pattern and works well in more linear formats.
Method
1
Stitch a cluster of three parallel stitches each over two threads and one thread apart.
2
Continue to fill the area to be stitched with identical clusters, each cluster six threads apart
3
Work over the space again filling in the spaces with a large horizontal and a diagonal over six threads. Working across the area diagonally will avoid dark threads trailing across the back of white fabric.
4
Using threads of different weights can create differences between dense and light areas which can be used to shade designs.

Embroidery Techniques
References
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Various Authors, The Royal School of Needlework Book of Embroidery (2018) , p.148