Toward the end I was desperately trying to work out if I'd have enough thread to finish the case. As it happened, I had about 6" left - a close call.
I may give the box a light rub over with gilding wax to highlight the textures of the lace. It looks rather drab here but in fact is a rather nice copper colour. The clasp is made from two tube shaped beads, one stitched to the lid and the other to the body of the box. A grungeboard shape painted to match the box forms the closure. I stitched one half of the shape to the lid and the lower part loops over the bottom bead. Grungeboard is available from good craft suppliers and is rather like cardboard but much stronger. It comes in sheets or various shapes and can be painted and stitched.