A toe-up sock with a gusset heel (the very best for toe-up socks), and a simple lace pattern
ERROR: Round A should read (bold item changed):
K F&B, K until 2 sts rem on Needle 1, K F&B, K1.
K F&B, K until 2 sts rem on Needle 2, K F&B, K1. 4 sts increased.