Final article in a series on weft-faced weaves, explaining boundweave as a block weave based on twill in which the treadling stays constant (often 2/2 twill) while weft colors are rotated to form patterns. On a four-harness loom it gives four blocks. It covers sett (4 to 6 threads per inch), a rosepath threading and an overshot threading based on rosepath, and a four-color block rotation chart. The figures include drafts, block diagrams and drawdowns, with a design adapted from Else Regensteiner's The Art of Weaving. Boundweave is recommended for rugs, purses and wall hangings.