I found Barbara Walker’s Bead Stitch pattern online thankfully, because I put a hold on the book at our library, but it’s closed for Labor Day weekend.
I have a couple of how to questions on these directions:
I agree it looks strange, but it’s knit one. It adds up in the row to 7sts and when you try the pattern as knit one, it works.
p2 tog-b is purl 2 together through the back loop and there’s a video for that on the Glossary tab at the top of this page.
It’s a lovely pattern stitch. Thanks for the link.
In some fonts the 1 and l look the same, so it’s a k1. You see how it appears again between the YOs and decs - yo, kl, yo, ssk, kl. They might have used a different font on the Row numbers so the 1 looks like a real 1.