six on
A rarely used technique of sewing a book on raised
cords. the number of cords being the same in
number as the sections to be sewn with a single
length of thread. Because each of the sections is
sewn to only one of the six cords does not mean
that the method is unduly weak, because when all
six sections are sewn they are pierced and
fastened together at head and tail. (236 )