How many artillery pieces did both sides have for First Manassas?

Pat Answer

Sergeant Major
Forum Host
Oct 8, 2013
“...somewhere between NY and PA”
I'm always on the lookout for information like this as well. According to Davide Pastore (if I counted correctly) both sides had about 55 guns (all types) in the vicinity: 41 in the engaged portion of McDowell's force and 14 at Centreville; 20 with Johnston's Army of the Shenandoah and 31 engaged of 35 pieces listed for Beauregard's Army of the Potomac. Of course these numbers may not be exact. A tedious but ultimately rewarding slog through the Official Records would be the next step:
First Manassas is in Series I, Volume II

Just finding this today so I hope this belated message helps.