When I had the idea of working some filet on the inside of my table mat, I first played with some samples along the side of my piece of fabric. The above book mark is one of those samples & I deliberately made it bookmark size so that it could be useful.
This one is worked by first creating a mesh, withdrawing threads in two directions, then whipping over them to make them strong. As I wanted a special hem finish around the edge, I very laboriously wove all the ends back in to give solid fabric again along the edge. I then worked the filling stitch & finally the hem. Just for the moment I can't place my hand on the reference I used for the filling stitch, but there is one very similar in Moyra McNeil's book "Drawn Thread Embroidery".
A very pretty, useful sample.