pupils responsibility is the defn ... it could be seen as 6,4 with the 4 being a synonym for drill
the 6 is where the pupils are (pupil NOT part of the eye)
Only got round to this today and I have it all done - except for the first (3-letter) word of the second c. Second letter is O - I think it may be what Louis is in French, but can't find that phrase anywhere ....