Thanks Ron,
That answers my question. Howitzer make more sense in this situation. The action was so close at this point in the action plunging fire was best.
I was sure that the new leader was named Key. I read Pat Cleburnes OR and in it he said that he moved the "Light guns" in to replace the Napoleans that he needed else where and sent Mr. Key to assume command from the corporal that was at that point in the battle acting the Napoleans.

Thank you,
Frank