Toe up Mountain form slippers/bed socks

I wrote about this pattern in this post
and Maria asked me for the pattern
I can't claim this as my own,  i'ts
based on a pattern  by  Wakako Sato
and just another way to make them.
It's an easy-measure-as-you-go pattern
(I have a large about size 10/40 foot)

Toe up Mountain form slippers/bed socks
10 ply wool and 4.5mm needles 9wpi
cast on 7 sts using wrap/turkish method
(14 sts in total)
continue knitting in the round using the magic loop method
1st row: knit
2nd row: *k1, increase in next stitch, knit to last stitch, increase in next stitch* for both sides of slipper.
Repeat last 2 rows 6 more times until 42 stitches (21sts each side)
knit in the round for 3.5cm (stocking stitch)
Knit 1, purl 1 rib for *6.5 to 7.5cm (*depending on size of foot)

(Knit 1, Purl 1) 5 times, cast off 1 stitch (this is the middle).

You will now be working back and forth-not in the round and turning after each row

Round 1: Knit 13, Purl 1, Knit 13, Purl 1, Knit 13.

Round 2: Knit

Repeat last two rounds until measures *8cms from Rib pattern. (*again depending on size of foot)

Fold in half wrong sides together and graft ( Kitchener stitch) together.
Kitchener Stitch
to set up 
Front row- purl on
Back row- knit on

Kitchener stitch Garter
1 Front Knit Off
2 Front Purl on
3 Back Knit off
4 Back purl on

(I have posted here the matching pair)