The 1911 Warren Welch list is a list of Quantrill survivors who were living in 1911. Presumablly compiled as a reunion list. The original is held by the Jackson County Historical Society I believe. The list was published in 1986 as below:
Warren A. Welch's account of his days with Quantrill's guerillas, 1861-1864 : with a list of Quantrill's men by Welch, Warren A. (Jackson County Historical Society Library and Archives, 1986)
I crossed referenced the 3 or 4 online lists of Quantrill's and Todd's guerilla's that attribute these men to Warren Welch's list then looked them up on the SOS site to see if a match to Shank's Regiment or Shelby's Brigade was present. The 4 of the 5 I posted were hits on the match sequence.
Logic goes like this. High probabilty that Welch would know who these 30 were, if living in 1911 and he knew, then he would have them on his 1911 list. Therefore look for info to try to tie the 1911 list to members's of Shelby's brigade or Shanks Regiment. Got 4 out of about a dozen or so names that I could attribute to the 1911 list. So its a start, certainly not the level of proof to publish.
Bob Thompson is the oddball because Welch reports him killed in the fall of 1863 while they were scouting for Todd. The time seems coincidental to your search and gives another name to look for in action reports etc.
Links to service cards below
Jacobs: (Became a physician after the war, Served with Jackman as well)
Thompson: ( I don't think he was in Shank's Regiment)
This pick as most likely as he was from St. Joseph MO and service indicates he returned west of river post Vicksberg and there appears to be only one Thompson with documented CSA service that is not listed as discharged or wounded or service after 1863, i.e. surviving beyond the supposed death date.
Its ok to tell me I'm way off base here with my logic thats why I use the word possible a lot :>) Just trying to dredge up names with some semblance of probability. If it makes it any better I think all 5 had Jackson County area connections.