From Knitted Lace Doilies* by Tessa Lorant. Revised to eliminate unnecessary shifting.
Cast on 16 stitches. Work rounds 1-24 as shown. Work round 25 as follows: *p48, yo, repeat from *
. Work rounds 26-50 according to part 2.
*Affiliate link. Buy the book and I get a couple pennies.
Shown with a cast-on count of 4 stitches.