In the library today, I came across a photograph of Bridge's Battery of the Illinois Light Artillery, turned out in full regalia.

See pages 134/5, The Civil War, The Struggle for Tennessee, by James Street Jr. and the Editors of Time-Life Books, "Tupelo to Stones River," Time-Life Books, Alexandria, Virginia, 1987

I believe Capt. Bridges, mounted, is seen in the center of the formation, behind the line of six guns.

.........................

Bridges' IL Light Artillery Battery
( 3-years )
Organized: Nashville, TN on 1/14/63
Mustered Out: 12/21/64

Officers Killed or Mortally Wounded: 2
Officers Died of Disease, Accidents, etc.: 0
Enlisted Men Killed or Mortally Wounded: 7
Enlisted Men Died of Disease, Accidents, etc.: 20
(Source: Fox, Regimental Losses)

.....

ILLIONIS
BRIDGES' LIGHT BATTERY

Bridges' Light Battery.-Capt., Lyman Bridges; First
Lieuts., William Bishop, Morris D. Temple, Lyman A. White,
Franklin Seborn; Second Lieuts., Morris D. Temple, Lyman A.
White, Franklin Seborn, William R. Bise, Clark E. Dodge,
Lawman C. Lawrence. This battery entered camp at Chicago,
Ill., June 21, 1861, as Co. G, 19th Ill. infantry, and left
Chicago on June 12. It formed a part of Gen. O. M. Mitchell's
division in his advance upon Bowling Green, Ky., Nashville
Murfreesboro, Shelbyville, Tenn., and Huntsville, Decatur and
Tuscumbia, Ala., in March and April, 1862. In June, of that
year it marched to Chattanooga, Tenn., as a part of Gen.
Turchin's brigade of Gen. Negley's expedition. Returning to
Huntsville, Ala., it marched to Winchester, Tenn., where it
was assigned to duty as provost guard. It afterward marched
over the Cumberland mountains, through Point Rock valley to
Bridgeport, Ala., and returned to Huntsville, where it was
assigned to guard the railroad bridge at Mill creek, and upon
the retreat of Gen. Buell to Louisville, the company was left
with the 19th Ill. infantry as a part of the garrison of
Nashville. It rejoined the infantry regiment upon the battle
field of Stone's river, Jan. 2, 1863, and entered Murfreesboro
with that regiment. In July, following, it crossed the
Cumberland, Sand and Lookout mountains, and served through the
battles of Dug gap and Chickamauga. At the latter place it
was warmly engaged each day, losing 6 men killed, 16 wounded
and 4 captured, and 46 horses. It participated in all the
operations at Chattanooga and was prominently engaged at the
battle of Missionary ridge. It then prepared to march to
Knoxville and was upon a campaign the entire winter of 1863-
1864. It rendered important service in the Atlanta campaign
and then participated in the pursuit of Hood's army into
Tennessee. After the defeat and demoralization of Hood the
battery had but little active service, and it arrived in
Chicago on June 27, 1865, for muster out.

Source: The Union Army, vol. 3