The 9th Battery Mass. Vols. lost 4 guns on Day 2, and those were retrieved by the 150th New York and 5th Maine later that night. Due to the lost in men and horses the battery only had two guns in action at Ziegler's Grove during Day 3 and remaining there during Day 4.

http://9thmassbattery.home.comcast.net/~9thmassbattery/MiltonReport.html
http://9thmassbattery.home.comcast.net/~9thmassbattery/150thNY.html
http://9thmassbattery.home.comcast.net/~9thmassbattery/5thMaineRegiment.html

Ed