Figure 18.—Parts of mat in plaiting process: plaiting begun at “commencement corner” (a) of “commencement edge” (b) and completed at “finishing edge” (c); upper edge of last completed section is the “plaiting edge” (d), as the next section has to follow along it; the section being plaited is the “working section” (e); its right oblique edge is the “working edge” (f), composed of a number of dextral wefts; alternate ones turned back to receive the next sinistral weft; direction of these wefts is marked at left edge of working section; on left and right edges of mat, the left (i) and right (j) foundation strips project from the unfinished plaiting.