On pg. 6 of the pattern:
blank square: K on RS, P on WS
square with horizontal line: P on RS, K on WS
The legend shows that a blank square is a knit on the right side and a purl on the wrong side. Directly below that, the square with the horizontal line is also listed as a knit on the right side. That square should actually be a purl on the right side and a knit on the wrong side.