Size 2 Clovers, magic cast on 20 sts (10 each needle) and increase to 56 sts.

Heel inspiration:
http://k2knits.blogspot.com/2007/03/revisiting-widdershin...
http://www.ravelry.com/patterns/library/generic-toe-up-sl...

Heel:
Increase from 56 to 76 sts (gussets).
Last round is a plain round.
T= 56
N=28
G=48
H=56

Turn heel:
Row 1) K32, m1, k1, W&T
Row 2) p18, m1p, p1, W&T
Row 3) k16, m1, k1, W&T
Row 4) p14, m1p, p1, W&T
Row 5) k12, m1, k1, W&T
Row 6) p10, m1p, p1, W&T
Row 7) k8, m1, k1, W&T
Row 8) p6, m1p, p1, W&T
You have now turned the heel (H), and H = N+28 = 56
K most of one round by knitting across the rest of the heel and across the instep; pick up the wraps and knit them together with their sts as you come to them.

Heel flap (working back and forth on heel needle only again)
Row 1) K41, ssk, turn (as you work across this first heel row continue picking up remaining wraps and k them tog with their sts)
Row 2) sl 1, p26, p2tog, turn
Row 3) sl 1, (k1, sl 1) rpt from to 1 st before gap created by last turn, ssk, turn (these are slip knitwise)
Repeat rows 2 and 3 until all heel sts but 1 have been decreased away.
On last row, don’t turn, and instead continue in the round by knitting across the instep, and then k2tog at the beginning of the heel needle to eliminate this last st.