Page 58, 4th line:
sl1 wyib on RS, sl1 wyif on WS = slip 1 stitch purl-wise with the yarn held in back on the RS, slip 1 stitch purl-wise with the yarn held in front on the WS.
Page 58, 4th line:
sl1 wyib on RS, sl1 wyif on WS = slip 1 stitch purl-wise with the yarn held in back on the RS, slip 1 stitch purl-wise with the yarn held in front on the WS.