This free pattern originally published in:
Spool Cotton #58, The Learn How Book
This free pattern originally published in:
Spool Cotton #98, The Learn How Book 
Cast on desired number of sts (divisible by 7, plus 2). 1st row: K 1, k 2 together, k 1, o, k 1, * o, k 1, sl 1 st, k 1, pass sl st over k st, k 2 together, k 1, o, k 1. Repeat from * across, ending row with o, k 1, sl 1 st, k, and pass sl st over k st, k 1. 2nd row: P across.
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