From the corrections page at Sixth and Spring Books:

Intarsia Lace Scarf, pages 72-75
Updated: 29Apr2013

Corrections are in bold

1. Materials 1 3½ oz/100g hank (approx 328yd/300m) of Noro Silk Garden Sock (lamb’s wool/silk/nylon/kid mohair) in #301 royal/purple/fuschia/lime

Notes
1) Divide yarn into three equal balls, approx 109yd/100m each.
2) Label the 3 bags, one each as color #1, color #2, and color #3.

1. Note that the stitch repeat is 12 sts on the RS rows and 11 sts on the WS rows. When working the charted the WS rows, p10 after the dec in rows 2, 4, 6, 8 and 10; and p10 before the dec in rows 12, 14, 16, 18 and 20.