Knitted interlace borders

It is not well known that George Bain also translated his Celtic charts into knitting patterns. A photo in the back of his ‘Methods of Construction’ book shows some of his knitwear. This particular chart shows how he is working out  the rows. He notes which are Plain and Purl stitches, with the number of stitches to be worked in each colour. But confusingly the white stitches are shown as dark squares and the green stitches as light ones.

The notes are for the upper of the two borders. The pattern repeat starts 11 squares in  from the right hand edge of the chart. It ends 34 stitches later, at the vertical line on the left. The page has been roughly torn out of a notebook and there are no annotations for the lower chart. Perhaps Bain wasn’t pleased with the results.