Double Herringbone Stitch Diagram 1
Double Herringbone Stitch (Diagram 1):
Bring the needle up at A, move down and to the right over two canvas intersections, bring the needle down at B. Bring the needle up at C, move up and to the right over two canvas intersections, bring the needle down at D. This completes the first stitch. Now, bring the needle up at E, move down and to the right over two canvas intersections, bring the needle down at F. Bring the needle up at G, move up and to the right over two canvas intersections, bring the needle down at H. Bring the needle up at I, move down and to the right over two canvas intersections, bring the needle down at J. Bring the needle up at K, move up and to the right over two canvas intersections, bring the needle down at L.  Now, continue on to Diagram 2...
Double Herringbone Stitch Diagram 2
Double Herringbone Stitch (Diagram 2):
Beginning where we left off at L, end this row by tying off your yarn. Now, start the second row from the left - remember - always work left to right. We will not work the second row into the first row. Instead, we will work the row one extra canvas hole below the first row. You will understand the reasoning behind this when we reach Diagram 3.
Bring the needle up at M, move down and to the right over two canvas intersections, bring the needle down at N. Bring the needle up at O, move up and to the right over two canvas intersections, bring the needle down at G. Bring the needle up at B, move down and to the right over two canvas intersections, bring the needle down at P. Bring the needle up at Q, move up and to the right over two canvas intersections, bring the needle down at K. Continue working in this manner until you reach the end of the row. Now, continue on to Diagram 3...
Double Herringbone Stitch Diagram 3
Double Herringbone Stitch (Diagram 3):
The light blue stitches represent the first two rows that we have previously worked. We will now add rows of  "Upside-Down" Herringbone Stitches.
Bring the needle up at A, move up and to the right over two canvas intersections, bring the needle down at B. Bring the needle up at C, move down and to the right over two canvas intersections, bring the needle down at D. Bring the needle up at E, move up and to the right over two canvas intersections, bring the needle down at F. Bring the needle up at G, move down and to the right over two canvas intersections, bring the needle down at H. Continue working in this manner until you reach the end of the row. Now, continue on to Diagram 4...
Double Herringbone Stitch Diagram 4
Double Herringbone Stitch (Diagram 4):
Again, tie off your yarn at the end of the last row and start the next row from the left. Diagram 4 illustrates two complete rows of the Double Herringbone Stitch worked in two colors.