A mill(stone) was needed to grind flour for bread and so it was a common early morning sound in any community of that era. That the sound of the mill no longer exists speaks to the absence not only of grain to grind but also of grinders to operate the mill and eaters to eat the ensuing breakfast. That familiar early morning sound will never again be heard in her, ever.
22 and the sound of harpists and musicians, of flute players and trumpeters, will be heard in you no more, and a craftsman of any craft will be found in you no more, and the sound of the mill will be heard in you no more,