given the few occurances when the french formed massed batteries, 10 or so out of 300+ engagements in the period, that massed batteries were not common knowledge or common place in terms of their command and control.
I grant that terrain, agreement between corps commanders to mass artillery in one spot and to deny some corps artillery support, and the way in which the enagagment was being faught dictated if a massed battery was neccessary. However given the low numbers of actions where massed batteries operated, I submit that overall text book doctrine was used far wider, and that a few senior artillery officers had the 'common practice' knowledge of such organisations.
I also agree a massed battery is a lot of batteries line up. but the command and control of the batteries and ammunition logistics, is beyond the text book doctrine.
If massed battery operation was 'common practice' why is the use of such a tactic restricted to a small number of engagements (proportionally to the total number of battles in the period)where Napoleon seems to have been present at most? in addition of these actions, how many had Lallemand Drouot or Griois as artillery CinC?