This free pattern is no longer available.
It was one of my first patterns I wrote and even though I then at the time tried my best to write it, it was very amateur in its form.
I now have written a new pattern with a different heel, with charts, photo tutorials and videos how to work the heel:
https://www.ravelry.com/projects/ma9/markenes-socks-lester#

Best wishes from Grete