Fig. 57. —Knotting on Threadswith Picot and Two FlatDouble Knots. … Fig. 58. — Knotting on Threads withFicot and Two Flat DoubleKnots. double knots, one below the other. Detail a shows the first knot begun,detail b the two knots completed. Fig. 58 shows the picots secured by ahorizontal bar of knots beneath them.