This sampler was also worked some time ago, the details of which were not posted. The working is here on Queenie’s blog.
The sampler is started with the basic stitch, the next two samples are the back of the same stitch.
Two rows of this stitch are worked in two ways in the first two samples. Individual stitches are worked in the last part of this sampler.
The sampler-
SSS.47.Two sided insertion stitch sampler