This pattern is available on the back of the yarn’s ball band.

Pattern errata:

Heel flap: may be approx half an inch too long as stated in the pattern.

At the end of turning the heel, knit 9 (10, 11) sts before picking up sts down other side of heel

Heel gusset: After picking up all stitches needle four should have 26 (28, 31) sts