You will need: a blunt yarn needle and spare dpn's or circular needle.
Start with the sides of the pocket lining. On the wrong side of the body, thread your spare dpn's vertically through the back of every second stitch, creating a guide for the sides of the pocket lining.
Thread your needle through a stitch on the lining and the corresponding stitch on the body. Keep the stitching simple and try to go in the same direction each time (in the picture the needle is always threaded right to left, the same direction that the seam is being worked).
Continue stitching every second edge stitch of the pocket lining to the stitches on the dpn, until you reach the bottom of the pocket lining. Remove the dpn. Then do the other side of the pocket.
The bottom of the pocket is done using the same technique. When I thread the dpn through as my guide, I do both pocket placements at the same time, so I can be sure they will line up. The bottoms of the pockets are visually prominent from the right side. Here, you can see I've picked up every second stitch. The part I'm going to stitch is the bump closest to the pocket lining. (It looks like I goofed a little bit with the dpn and picked two stitches right next to each other. Ah well, it's not rocket science.)
Whipstitch the base of the pocket as you did the sides. I find stitching every second stitch is enough and creates a lightweight seam.
