Now speed piece the half squares by stacking the two 3-7/8" x 19-3/8" strips right sides together and all edges aligned. On the back of the top strip,
mark the 3-7/8" square lines and mark the diagonals as shown at
left. Sew 1/4" above and below the marked diagonals, pivoting at the square lines. Cut apart on
the marked diagonals, and on the square lines. Press seam allowances towards the darker
fabrics. This will give you ten half squares. You only need nine of them for this
block. These should measure 3-1/2"...