It is certainly an intriguing documentary image, and the only one known to have been taken of dead soldiers during the Chancellorsville Campaign. It would not be until three years later that skeletonized human remains were photographed on the former battlefields west of Fredericksburg, by the photographic entourage of Dr. Reed Brockway Bontecou.
The question has remained though, "How soon after the action was Russell able to take this image?"
Popular belief has stated that it was taken within 20 minutes of Sedgwick's men sweeping the surviving Mississippians from the ground, and pressing them toward the eventual engagement at Salem Church.
A hand written note, signed "H. H.", most certainly Herman Haupt, Russell's boss, per se, does indicate the ground behind the wall was held in Union hands for a couple hours. There is no doubt of that, but there are still no details of the timing for this and other images taken that day.
It is said that a telegraph message was sent to General Hooker at 10:50 AM, advising him of Sedgwick's success. If we go with the "20 minute" suggestion as to when Russell was in place exposing the glass negative, we can begin to examine 11:10 AM. For this, we need to adjust, in simplest form, our clock by an hour to account for the hour gained by Daylight Saving Time, thus, without other smaller adjustments that can be taken into account, we will use the addition of an hour. In the three days leading up to this anniversary, I began the process to determine the timing of Russell's iconic photo. This advance examination was done to bar the possibility of rain, or overcast skies preventing the following of the sun's path. This effects the timing by only minutes. My investigative photographs taken just this past April 30th, at 12:14 PM, an hour and four minute adjustment, reveals that the shadows present along the wall at that time make the 20 minute suggestion impossible. As you can see, the entire west face of the wall is in shadow.
On May 1st, I produced the following photo at 1:16 PM, which again, for simplistic adjustment, would serve close enough to the appearance at 12:16, on May 1, 1863. I added pieces of dimensional lumber, cut to the exact length of an Enfield Rifled Musket, the predominant weapon seen strewn about in the original image, as markers to indicate scale and how shadows would be cast against the stones of the wall. The ground is brightly illuminated, and there is a lack of shadows on either side of the road.