Here is the fold3 link for him:
http://www.fold3.com/image/20/78629409/
I'm not 100% that was my ancestor, but so far that's the best record fit for him.
This topic sparked my interest again and I wanted to inquire to people with far more knowledge than myself, in an attempt to confirm (or disprove) what I *think* I've learned from this thread.
My potential ancestor William C Thomas enlisted as a Private, was promoted to a Corporal and then a Sergeant (was in the war from 1861 to 1864 where he died somewhere in Virginia, no confirmed record of this).
Here it says he was appointed Corp in 1862 and then sometime afterwards Sergeant:
http://babel.hathitrust.org/cgi/pt?id=wu.89059402289;view=1up;seq=114
On fold3 via muster rolls I see Private and then a big gap and then in 1864 a couple rolls as Sergeant ("4 Sgt"). As a Private in the remarks it mentioned he was often an ambulance driver and driving a wagon:
https://fold3.com/image/20/78629409
When he's listed as a Sergeant he is no longer mentioned as driving a wagon or an ambulance. My basic assumption would be while a Private he was assigned as an ambulance drive and wagon driver... later after being promoted he stopped getting assigned those tasks? Would that be correct? Also when it does list him driving an ambulance/wagon sometimes it gives a date range... does that mean he would otherwise be in regular service and those remarks are just noting him doing non-regular troop activities?
Thanks for any comments, trying to see if I'm understanding things correctly.
Also on a mostly unrelated question (but since I've already referenced two references)... I'm still trying to validate that this William C Thomas was my ancestor... I've searched fold3 records and some others like that book on hatitrust in an attempt to find any info on him. It seems his last roll was in 1864 and then he disappears. My ancestor was the right age (a record on fold3 mentions him being 27 when the bounty roll was taken 1861-1862, the two census records for my William says he was born 1837/1836, not exact but within the couple years census records can be incorrect. The bounty roll says the enlisted William was born in Lumpkin County, mine was likely born in Gwinnett or Murray County, though by 1850 his parents and him were living in Lumpkin so he likely was raised there so him stating his birth county could fit (plus this was shortly after Lumpkin was formed in 1832 and county lines were changing). This William (with the referenced war records) was in Company C of the 11th Georgia, formed from Murray County Georgia. In 1860 my William was living in Dawson County, GA living next door to his in-law parents (John and Clarissa Langston), though he parents were in Murray (Jesse and Rebecca Thomas) and he likely lived there before getting married and moving next to in-laws (so it seems it could fit he would enlist with friends in the county next door).
My William was on the 1860 census then is dead or gone by the 1870 census, along with his wife (Amanda Langston). All of his four children are split up between three relatives households. From a wife of a cousin I found a family story that he died in the Civil War at the Battle of Mansassas (I suspect if he did serve then him dying at that battle, 1st or 2nd, was false) and his wife died shortly after child birth of their youngest daughter (my ancestor) Nancy M Thomas (where M is supposed to be for Manasass) when she was 7 days old. It seems he definitely died and/or disappeared at the right time. I see no probate records involving him or his wife, or guardianship records... though if he disappears without confirmation that might not lead to probate records (or they were lost).
So far this William C Thomas seems the best fit... via a marriage record I know my William C Thomas has the same middle initial "C" (so at least gives some narrowing down to a fairly common name)... also the one in these records seems unaccounted for. I found one site that mentions him:
http://www.murraycountymuseum.com/mf102.html
It outlines his service record well, though it confuses him with a William Thomas who married a Rachel. It mentions:
"Records in the Murray County Courthouse indicate that Sergeant William C. Thomas was killed in 1864, somewhere in Virginia."
Though I've been unable to find it in the online imaged probate records, though I'm guessing that may answer my question (some day I'll have to travel and look through the county court records and see if I can find it, cannot contact the author of that page either). The William Thomas they confuse in the 1860 census is still living in the 1870 census (so can't be the one that died). In Murray County 1860 there's only one other William Thomas that could fit, though he's born in Tennessee (definitely not Lumpkin County, Georgia).
This leaves this William C Thomas as the best fit for mine so far... but I'm wondering if there are any other Civil War records I might be missing that anyone knows about to find any more info. Any tips, sources of info, etc would be greatly appreciated.