A Group of African American Men Repairing Railroad Tracks Near Murfreesboro, Tennessee (1863)

A group of African American men repairing railroad tracks shortly after the Battle of Stones River near Murfreesboro, Tennessee, 1863. Animated stereoscopic photographs.

Source.

Animated Time-lapse Stereoscopic Photographs of a Group of Men Posing in and Around the Ruins of a House

The original negative plate.

Two animated time-lapse stereoscopic photographs that were taken on one plate of a group of men posing in and around the ruins of a house and a tent set up next to it. Location unknown. Animated stereoscopic photographs.

 Miller's Photographic History of the Civil War describes the house as being the Henry House located on the Bull Run battlefield, but they do not look the same.

Source 1.
Source 2.