I worked this in one piece side to side from the underarm. However, it was a bit complicated with yarn strands hanging off all over the place, and to make it a bit less intimidating, I have written this pattern for you in 3 pieces seamed together. You can of course do it in one piece as I did. Explanation is in the pattern. All worked side to side.

Pattern calls for:
4(5,5,6,6)skeins Tahki-Stacy Charles Cotton Classic(100% mercerized cotton 108yds/50g) Color # 3744
2(2,2,3,3)skeins each colors #3716 and 3717

Currently available only in the ebook