In working string figures, one goal (besides being able to actually form the figures) is to be able to work through the movements as smoothly as possible.
A section of string passing on the palm side of the hand from one finger to another on the same hand is referred to as a palmar string.
As you raise the index fingers, hold this string tightly in the crook between the thumbs and index fingers and rotate the hands so that the palms are facing away from you.
Once you get the hang of stringart, you should be able to re-create any design you see here from the pictures.
Aside from 'filling in the circles' with string, you will notice there are additional nails and designs within some of the paisleys - not something seen often in stringart.
Yes, the securing points for the string in the upper left are behind the mirror.