French Double Seam

For joining such stuffs as fray, use the so-called French-seam.

Run your two pieces of stuff together, the wrong sides touching, and the edges perfectly even, then turn them round just at the seam, so that the right sides come together inside, and the two raw edges are enclosed between, and run them together again. See that no threads are visible on the outside. This seam is used chiefly in dress-making, for joining slight materials together which cannot be kept from fraying by any other means.