Taken from the book by William Frassanito; Grant and Lee-The Virginia Campaigns of 1864-1865. These three pictures are from a group of 7 images taken at the same location. They were taken in Fredericksburg on either May 19 or 20th 1864. These men were casualties from the the Battles of the Wilderness and Spotslvania. The fact that they were evacuated to Fredericksburg means that they were wounded and died from the wounds in the days following the battles. That would explain why they are not wearing shoes. These men were in hospitals and probably had most of their soiled uniforms removed during their time there.
Of further interest in the middle image posted by Ms. JPK Huson is the man wearing the straw hat and duster (the same man reading over the deceased), looking down at a particular grave. The original glass negative which was examined by William Frassanito at the Library of Congress for his book was clear enough to read the name on the grave this man seems to be looking at.
From Frassanito's book page 93;
"The inscription on the headboard reads Lester Baum...A...121st" After a lengthy search into the casualty lists of all units numbered 121, it has been determined that the inscription refers to Sgt. Lester Baum, Company A, 121st New York Volunteer Infantry. According to his military records , as well as the pension file of his widow, Elizabeth A Baum, Sergeant Baum was born in Danube, New York , a small upstate farming community in Herkimer County about 1838. In 1859 Lester and Elizabeth were married , and on April 23, 1863 nine months after Lester enlisted in the 121st New York, their first and only child, a daughter named Ella, was born. Baum's 1862 enlistment records described him as 24 years old, a farmer, five feet eight inches tall, with blue eyes and brown hair with a light complexion.
On May 10, 1864, during the fierce fighting at Spotsylvania, Sergeant Baum received a gunshot wound to the chest, the bullet passing through his lungs. He was subsequently transported by ambulance to Fredericksburg where he died of his wound."