An installment in Paul O'Connor's series on double weave, extending from 4 harnesses to 6 and 8. It lists what 6- and 8-harness double weaves can do (multiple tabby layers, pattern layers, pickup, block patterns) and counts the possible warp color combinations. It analyzes the layer structure and tieups of a Kay Sekimachi monofilament wall hanging woven as four crossing layers. It then covers pattern weaves in double-width cloth, including the reversal of the lower layer's pattern and a corrected treadle sequence for the twill join at the closed selvage.