A great period image of Union soldiers on picket duty along the Coosaw River in South Carolina.  The Coosaw River is south of Charleston around Beaufort, South Carolina.  This original CIvil War period photograph has three Union guards at the rivers edge.  While you can't clearly see the men's faces, it is most likely that these are United States Colored Troops.  Two of the soldiers are armed with rifles.  The image has been matted in a brown matting.  The image is approximately 2 1/2 inches by 2 7/8 inches.  The matting measures approximately 6 7/8 inches by 6 1/2 inches.  A card is attaced to the back of the mat which says "Civil War: Albumen photo...Union Guards on picket duty...at Port Royal Ferry on the Coosaw River, South Carolina...scene of a "sharp" engagement on Jan. 1, 1862...photo taken in 1864.".