Well I'm pleased to say that my filing system worked - in a box, helpfully labelled " stuff"
I've found 31 pieces of silk, slightly textured and some 'shot' colours, each 8" * 12.5"
I also found 28 pieces, varying from 12" * 8" to 7.5" * 8", of so called Art Silk ie rayon
Thinking about a bag in the Art Silk and wondering if I should use the silk as it is or cut up?