Closed feather stitch brings the ‘V’s of the feather stitch together giving it a ladder like look. It can be used as a decorative stitch with embelishments.

I will work between two stitch lines A and B.

closed_feather_stitch_1    closed_feather_stitch_2
Fig 1: Begin by bringing out the needle through the stitch line A. Then, take it through 2 and bring it out from 3,both points which lie on stitch line B.
 Note that 1 positions diagonally to  2 and 3.
  Fig 2: Now, take the needle in through 1 and bring it out through a point which lies just below it on the same stitch line.
closed_feather_stitch_3    Fig 3: Continue this process. A finished portion of this stitch should look like this