first seam sewn, first seam ripped out

The surest way to learn that flat felled seams start with the allowance to the outside, face side, of the garment, is to sew a seam and see that you've got it backwards. After carefully picking out tiny stitches from silk brocade I started again.

So, I laid the pieces together, face sides out, sewed a seam with a 1/2 inch allowance, and trimmed one side of the allowance to just under 1/4 inch.

Then I folded the larger allowance over the trimmed side and pressed. I did this before pressing the seam open because I figured it would be less fiddly. 

After pressing the pieces open I stitched 1/16 from the edge of the fold.

Here's the seam from the back.

And from the front.

A very pretty seam!