Possible Clues:

• Mnemosyne's daughters
• This hut seems enough for nine
• The thousand ways of employing nine?
• Perhaps one employs inspiration with them
• Those ungrammatical ways of employing the nine of them
• It takes nine for those ungrammatical employments
• Those ungrammatical sorts or employment - all nine of them
• Ungrammatical ways of employing those nine
• The sum of these comes to nine
• The thousand ways of employing those nine