I have internet access for the next six days, getting back to checking on this. Knittingfool now has Nupp Lace 1 listed with a multiple of 20 stitches plus 19; I still think that it is a multiple of 20 plus 21. Additionally, the End Row instructions for Rows 13 and 15 should show no changes to the repeat pattern, so the pattern as it is written on the site is incorrect. I am picking up my needles, will cast on 61 stitches
It's a lot of knitting but I need to know if the 20 plus 21 numbers are correct before I continue with my project.