cable row is a purl row
To answer your question, yes the purl row (the fourth row) is a cable row.
The pattern is from Cascade yarns, Cascade 128 Superwash Weskit vets designed by Betty Balcomb.
Actually I do not understand the part after you knit three inches ending with a wrong side row (does that mean the last side you knit is on the wrong side?) ( I have been knitting these three inches on a circular needle suing two balls of yarn and so two separate pieces.)
Now I join them to knit in the round. But how is that open flap in the back closed? At the end it says there is no finishing or hand sewing required....although it could be just sewn to gather by hand since I can't figure any other way.
Thanks for your help.