Hold again in the hand so that the clapper loop points down and the 8 strands are also draped downward. Using a small rubber band, secure the 8 strands against the Matthew Walker.
This differs from the Wall knot in that each strand comes up, not through the bight of the next strand, but through the bight of the next strand but one (2nd strand).
The completed first round.
Pass the first strand end through the next bight, in a counterclockwise direction. (Done similarly to the Matthew Walker)
The completed second round.
Cut and remove the rubber band, then gently work the knot down to a more manageable size. Do not tighten yet as you still need to double the knot.