Work a stem stitch from A to B and then bring the needle to the front at C on the left-hand side of the stitch just created. Slip the needle under the thread from right to left, without catching the fabric, and pull the thread through to form a wrap. Keeping the thread above the needle, slip the needle back under the first stitch again, below the wrap, to create a second wrap. Create another stem stitch as before and pull the thread through and work the two wraps as before on this new stem stitch.
