It is worked by bringing the needle from one point (A) to another (B), diagonally below point A, and then straight across on the back of the cloth to another point (C), directly underneath A and to the left of B, and then diagonally onto point D, which lies to the right of A and directly above B. From point D the thread is taken at the back of the cloth to point E, between points A and C, from where the same pattern is repeated. This stitch is similar in appearance to a closed herringbone stitch, but is made in a different manner.
Source: THOMAS, Mary (1934). Mary Thomas's Dictionary of Embroidery Stitches, London: Hodder and Stoughton, p. 10.
Digital source of illustration (retrieved 4 June 2016).
GVE