Now piece the block!. Lay out all the units as shown
at left. Sew three horizontal rows, pressing the top and bottom row
seams towards the center, and the middle row seams to the outside. Sew
the rows together, and it's done! If you'll be having the center of
these signed, it's helpful to iron some freezer paper over the center
section on the block-back, to stabilize it during writing!