I recently received an email from a lady that was a bit confused with my explanation of what a SPR is-my term, of course. So being one that believes that you can always improve things, I took a look at the picture on page 3.
When I pondered on it a bit, I realized that it was the horizontal loop laying at the base of the slipped stitch from the previous row that I actually lift onto the right hand needle to be knitted.
I decided not to change the term SPR, but, I put a more clear explanation of the process in the chart key and replaced the illustration.
Here is the new picture.
This loop is made, when the purl or knit at the end of the row is forced to the left, or in the direction your are knitting, when you slip the first stitch after the turn. The “loop” is what forms the gaps.
I hope this clears things up. Who knows, I might even come up with a better illustration in the future. If I do I will post it.