Figure 29. Commencement of screen (pataro whani), a, full midrib (whani) (9) with far leaflets (1, 2) and near leaflets (1′, 2′); far leaflets form natural dextrals; first near leaflet (1′) on left crossed over midrib and under its opposite leaflet (1) to form first sinistral weft, b, second near leaflet (2′) passed over midrib and also under first dextral (1) as technique is to be twill; two extra free leaflets (1″, 2″) introduced as dextrals to fill wide space between two natural dextrals (1, 2); extra leaflet (3″) also added as extra sinistral; first sinistral (1′) bent in to function as dextral and commence left edge of screen, c, third near leaflet (3′) has been crossed over midrib to act as sinistral and second sinistral (2′) has been turned in to define further the left edge. d, another free sinistral (4″) added; extra sinistral (3″) turned in to continue definition of left edge, e, fourth near leaflet (4′) has been added as sinistral and sinistral (3′) turned in to define further the left edge, f, development of twilled technique and use of additional wefts.