For the first stitches and all the ones to follow, you will pick up just one linen thread from each side. The seam allowance that is turned under works to give the project shape and to keep the edges from unraveling.

Begin with a straight seam. Match the design of the two pieces carefully. Make the first stitch twice. This double wrap stitch anchors the fiber without a knot. Remember that you are leaving a tail (indicated by blue) below this stitch. Later, after you begin to stuff the ornament, you will re-thread your needle with this tail to stitch the last diagonal seam for this section.

Now you will begin to sew the seam. With a sewing motion, work along the two seam allowances, each time taking your needle straight across and under one linen thread on each side. The stitches that you make for the seam will share holes with the cross stitches that formed the outside border of the design area, shown here in gray. Repeat the double wrap stitch that you used to begin this section. 

Each time you change direction -- from straight to diagonal or diagonal to straight, make a double wrap stitch. This anchors your working fiber and keeps the part you just completed in place while you move on to the next part.