There are two monuments to the 4th United States Artillery, Battery G on the Gettysburg battlefield. The first is north of Gettysburg along Howard Avenue on Barlow’s Knoll (Howard Avenue East tour map). The second is southeast of town in the National Cemetery (National Cemetery tour map)
Both monuments have identical tablets with the exception of the commanding officer listed. Lieutenant Wilkinson is listed as commander on the Barlow’s Knoll monument, where he was mortally wounded. When the battery redeployed on Cemetery Hill Lieutenant Bancroft was in command, and is listed on the monument in the National Cemetery.
From the monuments:
Army of the Potomac
Battery G Fourth U. S. Artillery
Six 12 Pounders
Lieut. Bayard Wilkinson commanding [or]
Lieut. Eugene A. Bancroft commanding
July 1 Arrived at Gettysburg about 11 a.m. Advanced and took position two sections on Barlow’s Knoll the left section detached near Almshouse. Engaged Confederate Infantry and artillery on right and left. Lieut. Wilkeson fell early mortally wounded and the command devolved on Lieut. Bancroft.
The sections were compelled to change positions several times. Retired about 4 p.m. one section relieving a section of Battery I 1st Ohio on Baltimore Street in covering the retreat. About 5 p.m. took position on Cemetery Hill.
July 2 Moved to rear of Cemetery facing Baltimore Pike. In action at the Cemetery from 4.30 p.m. until 7 p.m.
July 3 About 2 p.m. two sections were engaged in the Cemetery until the repulse o the Confederates.
Casualties: killed 1 officer and 1 man, wounded 11 men, missing, 4 men.
Ammunition expended 1400 rounds.
31 horses killed.
Location of the monuments
The Barlow’s Knoll monument to the 4th United States Artillery, Battery G is north of Gettysburg on Howard Avenue. (39°50’43.9″N 77°13’34.1″W)
The second monument to Battery G is south of Gettysburg on the east side of the National Cemetery. (39°49’12.0″N 77°13’50.4″W)
The battery is referenced on a marker at Antietam.
See more on the history of Battery G, 4th United States Artillery in the Civil War