There are errata in charts:
1. In Diagram 3, the pattern repeat should begins at the 4th stitch, not the 6th St.

1. Legend should be as followed:

Blank square= knit on RS, purl on WS
U=yarn over
/=SSK
\=K2tog
^ with | in the middle=sl 2 knitwise, K1, pass slip st over
-=purl on RS, knit on WS
solid triangular=P3tog
wide oval=on RS, yarn over, on WS, P1 and K1 into this yo