The inserted heel sock is probably the oldest and simplest of all sock architectures. For centuries, individuals have knit a tube with a toe at one end, then snipped a stitch and unraveled sideways to open a space to knit the missing heel. Elizabeth Zimmermann called it an "afterthought heel" and today's popular short-row heel actually produces the same architecture via a different sequence, with the heel knit in place rather than added later.

The Houdini socks offer another approach to this ancient architecture… READ ON