Kurt Graham has found a plausible candidate for the forgotten sharpshooter. I agree this particular soldier seems quite suiting to the circumstances.
No, he is not HCP. Rather instead, his name was William Adair, a member of the 3rd Georgia Battalion of Sharpshooters under Wofford.
William Adair was 33 or 34 at the time of the battle. After the battle, Adair was listed as KIA on the 4th of July.
Mentioned in the DDSS Report was one J. A. Carter, a member of the 3rd Georgia and listed as MIA on the 3rd. Kurt eventually found James Carter was captured by Union troops and survived the war. There was no mention of Adair in the G'burg Military Park library. Kurt found Adair through an extensive search through Georgia state archives.
As for Adair, he was a bachelor of certain French ancestry who worked on his aging mother's Georgia farm. This is a brief from Mr. Graham:
"The more intriguing (at least to me) 3rd SS candidate is William M Adair. He is listed as killed in action at Gettysburg on July 4th 1863. This is odd as I've found no other casualties in Wofford's Ga Brigade on the 4th. The date would certainly indicate a "fresh" body.
I've spent a good bit of time trying to track down his family's descendants. Adair was the son of a Gwinnett County judge, Robert Sidney Adair and his wife "Patsy" LeFevre Adair. The mother was from a prominent French Huguenot family. This interested me because I think our lad has a distinctively Gallic cast to his features. Adair was a 31 year old single man running his widowed mothers farm in the 1860 census.
He died single but had two brothers who survived the war (his sisters died in the 1840s). They were Robert Sidney Adair II and Madison LeFevre Adair. I've found several descendants so far, but no photo yet.
I've heard of an Adair family historian (aptly named Robert Sidney Adair) but have not yet been able to run him down. I'm beginning to think he might have passed away or possibly be in a nursing home. At any rate, I'm continuing to chase William M Adair as my best candidate."
And so, William Adair had two brothers, both surviving the war. From numerous other letters, I knew that Kurt had performed an extensive genealogical search, finding several branches extending down to present day (oddly, one family on the West coast is actually named Groves). It was hopefully thought that perhaps a photo of William Adair might be found. Thus far, as Kurt said, all attempts have failed.
When it comes to battle conditions, it is often found that not everything fits perfectly. Certainly, as in the case of sharpshooters, who often worked alone, specifics may be hard to find. A listing in a roster with the designation of only KIA and a date can leave so very much to question.
As to circumstances surrounding his death, we only know William Adair is listed as killed on the 4th. Reviewing Martin's account, Kurt and I are plausibly left with the impression the sharpshooter was at least wounded on Friday, the 3rd day of battle, and perhaps lay alive until the early hours of the 4th. We might presume the designation KIA means the death is witnessed or confirmed by someone.
The question becomes, if the DDSS was Adair, then who came and found him dead on the 4th? It could happen. Perhaps a single soldier was sent out to check-up on the sharpshooter. A searching comrade might not have retrieved any of those certain valuables -- like a kepi, or knapsack — found later within the "Home". Perhaps this comrade found Adair during the night-time and actually witnessed the final breath."